uhhh... you need to remove the plastic that covers the screen and use the included screen protector. there's a big difference in usability between what covers the screen on a new device and the screen protector that comes with the phone. is this your first WM Smartphone? if it is, by now you've realized that the way you do things on a WM Smartphone is different than the iphone (ok, this is obvious, lol).
have you tried the Compact QWERTY keyboard, e.g., Suretype? i use it with T9 and (for me) it works quite well for texting/email responses. i even use the Full QWERTY keyboard (without T9) and, while my error rate is higher compared to the Compact keyboard, it's working for me. customization? i can't answer that because you don't list the "types of apps" you're using (besides aim, score checker, etc.).
i look at it this way, if you like the freedom to perform detailed customizations of your device, including ROM changes, test/use a plethora of custom software, etc., consider the WM Smartphone. if you want to keep it simple, stick with the iphone. only you can help you like/not like your touch hd. (i'm sensing you're headed back to the iphone soon ).