What is your "Vitamin Philosophy?"

I take an adult multiple vitamin. I do believe overly large doses of vitamins cause expensive urine but I think most of us could use a daily supplement. I do take a mega dose of d but I know from lab work that my levels in d are only marginally normal even with the additional vitamin. They are horribly low without it.

eta: I also know that even though I am trying to "eat healthy" my choices aren't always that well balanced.  I don't know that I get sick any more or less often than those around me. 

I took a multi vitamin for years and don't believe for a second that it protected me from colds or flu. I gave up taking them when swallowing became an issue and don't feel any less healthy for it.

I take Vitamin B2 for my migraines along with some magnesium. I also take Biotin as the blood pressure meds I take cause hair loss and I take calcium for my bones.

I think mostly vitamins are a racket and I think you can get good nutrition from a reasonable diet. So I don't personally take them, except a D supplement which is meant to correct my blood levels when I don't get enough in the winter. A supplement to correct a deficiency makes perfect sense, but personally I don't take a multi.

My philosophy is to eat a lot of fruits & vegetables.

My philosophy drives my mother nuts. She's a huge fan of vitamins.

I am a vitamin and supplement supporter, but not in a buckshot kind of way that is meant to make up for poor nutrition. I eat quite well so I am not worried about the basics. I take a regimen based on targeted desired results for mood/PMS plus tummy troubles that border on IBS. I take things that my doctor recommends, and if I don't think they are working, then I ditch it. She and I work together on that. Here is my regimen:

AM: Probiotic, vitamin D, magnesium citrate, chaste berry, d-mannose

MID: Sam-E, b-complex, multi-vitamin, thyroid support formulations

PM: Sam-E, magnesium citrate, fish oil

I also take Armour thyroid daily as well as progesterone on days 15-28.

Since my targeted results are not designed to ward off illness, I can't say if it works in that way; however, when I do feel myself getting sick, I take pretty sizable dosages of echinacea and andrographis. That works.

I had bariatric surgery five years ago, and as a result need to take big batches of vitamins. Prior to surgery (and vitamin supplements), I was sick with colds every winter, often resulting in bronchitis and/or pneumonia. (I had bronchitis every year and pneumonia about every three years). For the last five years, I haven't even had a sniffle. No colds, no migraines (they were a near daily occurrence before). I attribute it to the vitamins.

I take the following: 

Vitamin D 
Fish Oil
Probiotic
Cal/Mag/Zinc
Turmeric

Its probably obvious I "believe" in vitamins as a way to get extra nutrients people need. I have to say, I rarely get sick-even when others around me do. I eat a fairly balanced diet so I don't feel the need for a multivitamin

you can also buy a "whole food" multi that can be taken on an empty stomach, and you do not get the "expensive pee" since your body can absorb the nutrients.

I go through phases where I take more vitamins but right now I'm in a less vitamin phase. I am taking a multivitamin, and I take D3 because it's a common deficiency. Otherwise I'm more convinced that my good health, especially in the winter months (no respiratory illnesses at all this past winter) has more to do with generally clean eating with minimal sugar, daily outdoor exercise, keeping the winter indoor temperatures on the low side (64 degrees) and diligent hand washing. 

Exactly this.

I take a women's multi as well as additional Vitamin D and Iron. I know from lab work that I am low in these two measures.

More fruits and veggies and no I do not take vitamins. I'm rarely sick, I'm actually sick less often then dh who takes his vitamins daily.

Actually it might.
There's been a bit of research into calcium supplements which have shown an increase in heart attacks in women who take calcium supplements.
The theory is that calcium taken in tablet forms enters the blood stream too quickly (unlike dietary calcium which enters the system more slowly) and the high level of calcium in the blood can lead to calcium deposits in the coronary arteries -> increased risk of heart attack.
Medical opinion is still divided on this, but the current recommendation is that unless you have diagnosed osteoporosis and if you are taking calcium "just in case" then it's better not to take supplements and to focus on getting extra calcium from dietary sources and also to maintain bone strength by regular weight bearing exercise.

There are also other studies which show that our bodies often don't handle supplements in the same way as dietary sources, therefore if you need extra vitamins and minerals, then eating better will be more beneficial than taking them in tablet form.

I think if you eat a well balanced diet with sufficient fresh fruit and vegetables then you should only take supplements if there is a diagnosed condition.

I've had lab work and diagnosed low level of VitD and iron. I make a big effort to get extra naturally in my diet but that still isn't enough to keep my levels normal so I take daily supplements. But these are all I take.
I used to take calcium but when all that info about heart attacks and latest recommendations starting landing on my desk at work last year, I stopped.

I think your philosophy doesn't take into account modern agriculture and other modern trends. Studies have shown that many plants that used to provide certain nutrients are no longer doing so due to these factors.

I almost never get sick with colds/viruses. I take emergen-c immune+ regularly (2-3x per week). I also suppliment vitamin d, b12, magnesium, potassium, and other things, depending on how i feel. I also accredit much of my health to being vegetarian.

Yes, I agree.  gar has mentioned everything that I was going to say.