In order, my favorite three from the past 5 years of involvement....
1.) AIM HIGH
By far the most amazing game, it had it all, and didn't involve PVC goals on casters!

It was different! Periods! Shooting above the player stations!
2.) Stack Attack
Boxes are fun, plus we won two regionals.
3.) Triple Play
No balls, three robots, cool ideas. Really neat.
I can say that I did not care for Raising the Bar, it was a rehash of previous years, and frankly, seeing more balls and PVC goals made me roll my eyes.