I started on 6600 Ultegra, then I moved to Chorus 11sp, and fell in love. I tried a bike with 6700 and it was HORRIBLE. I understand why they released 6800 so quickly. I now have a gravel bike running the 685 hydro levers, and Shimano really hit it with the new 105/Ultegra, but I would still prefer Campy. The shape of the hoods and the thumb shifter feel right to me. Only ridden a SRAM bike around the block, and the shifting wasn't bad, but I did not like the shape of the hoods. This was 5 years ago though...
As long as it shifts relaibly, I am happy.