Well, the one thing I MISS is my campy shift hoods. =P I've used the first generation ergo levers (8/9 speed), second generation (9/10 speed) and third generation 11/12/13 speed levers. The first were awful. The second were good. The last generation is really funky shaped and looks odd, but fit my hands really really well. I think the recent Shimano levers feel a little small and square after my 11 speed campy. So, before you go down the Shimano path to get 'better' levers, make sure you actually try them first.

Other than that, I love just clicking and having everything move into place!