I actually have 2 phones: a Nokia phone for calling and texting, and a smartphone that acts as a mini-tablet, for the data plan, mail, Skype, internet and games.
The Nokia phone lasts several days, the other one can be dead by midafternoon and is charged daily.
This is my jam, my phone battery lasts forever. I've been using a Nokia e71 + iPod Touch/iPad (no data plan any more) combo for a couple of years now.
95% of the time I ever NEED internet, I am at the office, home, or at a friend's place with wifi. I would rather spend the ~$1000/year all my friends spend on their iphone on other hobbies/ activities.
The Nokia phone lasts several days, the other one can be dead by midafternoon and is charged daily.