So, I hop on my Kinesis FF29 and this bike is amazing. The way it climbs up hills and rolls over stuff has to be experienced to be believed. OK, so it is not particularly comfortable and it's hard to move the front wheel around, but that's a small price to pay for the efficiency. I just need to get a bit tougher and work on my skills, but a 29er HT truly is the best possible bike and I'd never want to ride anything else.
Then, I hop on my 26" Trance and boy is that fun. The way the front wheel pops over stuff, the way you can just steam through rocky sections. OK, it's not the fastest bike in the world and those 26" wheels do get stuck in rocks from time to time, but that's a small price to pay for all that fun. I just need to get a bit fitter and work on my skills, but a 26" full suss truly is the best possible bike and I'd never want to ride anything else.
But there are 29er HT bikes that are more playful than the FF29 but still more efficient than the Trance. There are full suss 29ers that are more comfortable than the FF29 but still roll over rocks better than the Trance. Then there are all these in-between 650b jobbies that I've not even considered yet.
Oh, I give up.