My wife has a Rezound and she texts to her sisters and friends quite a bit through the day. She says she has to charge it every other day.
I have a VZW Galaxy Nexus and I use it moderately throughout the day, one or two calls, texting three or four people, 10 to 20 minutes of a game or two, and I have ~40% left at the end of the day. I just plug it in overnight and start each day with 100%. If I forget one night, I just bring the USB cable to work with me and plug it into my computer.
The chargers for these things are cheap now. That was one of the biggest turnoffs for me before, was how expensive they made the stupid proprietary chargers. But everything is micro-USB now. You can buy a charger for work, one for the car, and one for multiple outlets at home so you can plug the thing in wherever/whenever you need to, and only spend like $20. I ordered my phone from Amazon Wireless and they threw in a car charger for free. I just bought a charger pack that had an outlet charger, a car charger, and a USB cable for like 9 bucks.