I've tried quite a few and have had mixed results,
Neurocore SCS - Good initial pump but fades away about 3/4's through my workout. Also has a wide variety of flavors which is nice. Good amount of servings per container as well, around 35$.
BSN N.O. Xplode 2.0 - Tastes great,it's also fizzy bubbly which is always fun but didn't really do much for me. A lot of my friends like it but a lot also don't seems kind of like it either works great for you or it doesn't at all.
BPI 1.M.R. - Didn't do jack squat, tasted bunk as hell. Cool container though.
Cellucor C4 - Fruit punch tastes great, good amount of servings per container, good price, makes me turn into an absolute animal in the gym and sticks with me all the way through my workout. The only downside is that apparently it contains a much higher amount of caffeine compared to other pre workouts. (Drink lots of water).
I like to switch in between neurocore and c4 every 2 weeks.