I'm with you Matt. I got MT4G's for my son and I for Christmas. He's still got his original, but I'm on my 5th. The first one I had for four months before it froze and got stuck in the boot loop. The second one did the same thing a few months later. The third one downloaded a bad software upgrade and that killed it (I raised heck with T-Mobile about THAT $20 warranaty fee!), the fourth one had issues with the touch sensor (I'm illiterate when it comes to phones so I if I use the wrong terminology forgive me) after a WEEK, and this fifth one just died last night. I was deleting my text inbox and it froze for half an hour. I took the battery out and now it's stuck in the boot loop again!
Moving on to a Samsung I think. That's what I had for 10 years before I went to the MyTouch in the 3G days and I never had a problem.