I'm really torn about mine. If I didn't know about the Bionic probably coming sooner than later I'd absolutely keep the Bolt, but I'm just not sure. The battery life is about 50% of the it, the other 50% is being on a 2 year contract I don't know if I'm going to really regret having such a "slow" phone in 13 months. (compared to what's out) The biggest reason I wanted to get the TB was to make sure I got the unlimited 4G as I know my old phone was probably getting close to dying anyway.
I had my last flip phone for 6 years so it's not like I'm a major phone junkie, but now that I have a smartphone I can see myself really wanting to push it more and more. Not sure what the landscape will be like; there's a good chance even the "current" dual cores may be awfully slow compared to what's out in 2011! (I have a Pentium D dual core processor in my home PC. That's not exactly a speed demon just because it's dual core

Sometimes 1st gen of new tech isn't all it's cracked up to be, of course the same thing could be said about the TB)
I like the idea of being able to root the TB, versus probably not with the Bionic, although I wouldn't want to do it for a while until I'm fairly certain the phone's not going to have any issues.
My old phone could last DAYS so I just need to realize even if the Bionic's battery life is better, it still won't be as good as what I had, so in that sense I should be ok.
I do find myself toggling a lot and wonder if that will get old in time. (Wifi off when I leave home, back on when I get home, 4g if I need it, 3g just to have it running, etc)
I do make it through a day pretty easily, the only app I run for battery is Juice Defender which seems to really, really help.
I have a feeling if it came with a 1900mah battery out of the box I'd be keeping it for sure, the phone's quite fast... but I'm still 50/50. I don't know if I could handle going back to a dumbphone (especially if the Bionic came out and wasn't all it was cracked up to be in some way!).