I use AST VP-2 Citrus Splash flavor whey protien. It tastes decent but I don't really like the consistency of it, it's a light powder which doesn't mix very well with a spoon but does okay in a shaker cup, as opposed to the VP-2 fruit punch which is granulated (I think thats what it's called) and it dissolves right away in the water. I guess I should have tried it before I went and bought 4 tubs of it (great price)...lol, but I heard it is the best stuff on the market.
I have also used BSN NO-Xplode and this stuff is strong, the taste is really sweet and strong especially since you are supposed to use 3 scoops of it at a time.
I've used ON 100% whey and it's the same light powder consistency also, it tastes decent. Supposed to be good.
I'm looking into trying a creatine product as well but haven't decided on which one I'm going to try.