I learned on Campagnolo 10 speed, and loved the multiple cog shifts. It wasn't completely perfect. I learned how to rebuild the shifters to replace the frequently worn G springs, and twice had broken a frayed shift cable during a ride. I did find it hard to consistently shift one thumb shift for a smaller cog from the drops--I'd sometimes get two when I wanted one cog.

My other bike still has Athena 11, and I occasionally wave my thumb toward the non-existent thumb shifter when on the Di2 bike. I thought I'd dislike the new single cog thumb shifting, but it's actually pretty good. Di2 is still easier and faster than Campagnolo, and it's hoods are almost as comfortable as Campagnolo.