Welcome my friend

I was the same as you last year, thought 'no buttons?', nah wont bother giving this device a try. Was totally wrong ! Love it, got about 600 games installed on my ipod, so many great ones.
Have a look at this site, sale on lots of popular games until June 1st...
http://www.becausewemay.com/ios.htmlSome very good ones on there, check out Edge and Edge Extended, great isometric 'retro-ish' type games. Every wednesday at midnight theres a fair few new releases, you get games released before/after those dates but Apple refresh their top sellers list at midnight on wednesday so thats when new games tend to come out (As then they might be top of the list). Its exciting seeing some of the titles come out weekly.
Theres a lot of great platformers on iOS, check out Storm in a Teacup, please check out Swordigo (Zelda-ish platformer), amazing value when most of these games are a quid or two. Also Paper Monsters, gorgeous looking platformer.
Worth going through this whole thread as well as a lot of the games we've probably raved about are probably on sale now (or even free).
I now get a lot of itunes vouchers online on ebay, some great deals to be had, i get one a month from this guy...
http://www.ebay.co.uk/sch/mcccix/m.html ... ksid=p3686Eg £30 itunes voucher for £22.49. The saving might not sound huge but saving £7.50 means thats 15 or so games. You basically get emailed a voucher code to use, used them about 8 times so far and everytime its been fine. Worth saving a bit of money.
Theres a HUGE variety of games out there, worth checking out websites (or some of the iOS mags in WHSmiths), slingshot racing is cool as its very unique, but theres also a lot of 'micro machine' type racers out there. Just so many different types and mostly at cheap prices. I thought i would hate touch screen controls but i'm so used to them now, play a lot of platformers on my ipod, love it.
Also worth searching for certain terms in the app store, eg LCD brings up quite a few 'game and watch' type of games which are decent for a laugh. I regularly type in vector as i'm a huge fan of Vectrex style games (Space Junk is great and infinity field).
Edit - Just come out today - Razor Salvation (not working on an ipod touch 4th gen yet , waiting for an update)....
http://forums.toucharcade.com/showthread.php?t=136366 - JUST 69p ! Looks like a cross between Operation Wolf/Cabal type of game
Also please check out Air Mail -
http://forums.toucharcade.com/showthread.php?t=135704Amazing looking game, bit like Pilot Wings on the ole Nintendo. Both links above have youtube videos so you can check out the gameplay. Worth picking up Razor Salvation as its on an intro price of 69p