The Rezound can do so much so well, that it makes me want to use it more than I use my previous phones. So I eventually got sick of my standard battery dying out so fast and ordered the extended battery.
I personally don't like to have to carry around extra standard batteries. I also don't like switching out batteries, because every time I try to pry open the case, I feel like I'm gonna break it.
This may sound weird, but it really seems like I get more than double the battery life out of the extended battery compared to the standard one, even though its capacity rating is not double. Maybe my original battery was bad (I heard, every individual battery is different). Or maybe it was because I recently switched to Scott's Sense Less Clean Rom Developer Edition, which is good on battery life.
I usually get about 5-6 hours of heavy use from the original battery, but with the extended, it can last 12 hours easily. I'll even get 35hours out of it if I'm too busy to play with my phone constantly.
Now, I just leave 4G on, auto brightness, allow syncs regularly. I used to even underclock my phone, not anymore.
So now, my Rezound is the perfect phone for me, well, almost. The extended battery makes the phone so bulky that I hated it at first. But after seeing how well it performs, I chose function over form as I always do. But in actuality, it still feels good in the hand. I use the "bumper" style case from HTCpedia, the one that has the cutout for the back of the battery, so it's not as thick as other cases. It oddly has an oem look to it.
I dropped by bestbuy and saw the HTC One X. It looked really nice in person. I like the design, and how it is almost all screen. The bezel was very minimal compared to most phones. At that point, I really wanted it, but I remembered that it had a non-removable battery, and I bet the built in battery would not be enough for me. So the Rezound is still the best phone out there for me.