Customise User Profiles

I’m sure ths has probably be asked a thousand times before, but I haven’t managed to find anything, so I apologie for being repetitive.

I’m looking to edit the user fields available in the profile page.
I am aware of the contactmethods hook, but as far as I can tell that only allows adding text-boxes. I’d really like to add dropdown and texarea fields to it.

I’m also looking to find out if a new heading can be created. My site is primarily for gamers, and I’d like to have a GamerTag field associated. This is fine for a text-box, but I don’t really feel it is appropriate in the Contact Info section, and would like to add a gaming section instead.

Can anyone help me out?
Cheers