If I can get at least over 10+ 2G talk time and over 30+ hours worth of music, I'm content. This iPhone matches the longest hours of the bigger and latest iPods.
I used to talk to my girlfriend for 5-10 hours and I remember hating to charge it after 3-4 hours again with my Nokia N82. Now its battery life is crapping out on me and the indictator is no longer accurate. A new phone is practically mandatory for me to get because of my current one's unreliability.
Battery life is very important to me. I can talk on the phone for hours without knowing 2-3 hours have passed. Most Androids are packing faster chips in their phones, but they are obviously taking a hit on battery the faster they become.
I hear the iPad has excellent battery life. So glad Apple added the A4 chip to their latest iPhone. This A4 chip is supposed to be energy efficient, so I like my chances that the battery life should be great especially if you compared it to the other Snapdragon-driven Android phones out there.