Three come to mind.
1. Hitting the "million dollar shot" on NBA fast break is a great feeling, it is timed and keeps you in the game.
2. Guile shot on SF2. It is tucked away all the way in the back and takes an extremely precise shot to nail it.
3. Getting the last jump shot on the upper playfield on Banzai Run. Takes some work just to get there and that mini flipper is intimidating.