I personally use creatine, protein, glutamine and a good multivitamin. I dont agree with the "if you have a good diet then you dont need supplements" talk.
Supplements are exactly what they say, they are there to supplement your daily food. To get 5 grams of creatine daily you would need to eat about 20kg of steak per day. This is just not possible so thats why supplementation is needed.
Also the fact that people who train need more nutrients than the normal sedentary person (this is what RDA values are calculated from)
Oh and im over 200lbs so ive got a decent idea of what im talking about