Honestly, I'm struggling to think of something that this phone doesn't do well that I'd like it to do.
With the extended battery, I have enough juice to go a full day of even fairly heavy use without worrying about charge. Would I like a battery that lasts two days? Sure, but it's on the charger every night.
With the 8mpix camera and 720p video with sound, I no longer have to carry around my 12mpix camera - the Tbolt takes pictures that are far beyond snapshot quality and very nearly the same quality as my Lumix, and I have one less device (and one less battery) to deal with. Plus my photos are geotagged and I can share them instantly on Facebook, Google Plus, email, etc.
I can geocache with c:geo open source, I can check my pulse, I can measure the height of trees, I can get driving directions with voice, I can check and update fuel prices with GasBuddy, I can check signal strengths in areas I'm about to visit with Sensorly, I can check the weather and look at radar, I can surf the web with Flash video, I can text/audio/video chat on Skype and Google Talk, I can find and identify constellations with Google Sky Map, I can identify satellite passes with HeavensAbove, I can scan barcodes at work to save keying 20- and 30-character numbers.
How can anyone with all that capability in the palm of my hand be jealous of one that maybe does the same things a little faster?