My Experience with Android

So I realize I haven't posted here at all recently. I've been really busy with school and all... but during that time, I've finally been trying out Android, which I wasn't able to do in the past. And let me tell you I really haven't had a very good experience with it.

The first Android phone I got was the Samsung Moment. It overheated... a lot. The battery drained in a little over two hours. So I decided to switch to the HTC Hero. I've been having similar problems, though the battery does last much longer. So my question to you Android-lovers is this: have you had similar problems? Has flashing your phone with a nice new ROM helped at all?