For me, HTC's strength was their continued devotion to physical QWERTY siding keyboards. I'm simply not going to be SSH-ing into a server with a touchscreen.
Two things have sunk this affection. First, HTC (like the rest of the industry) is moving away from physical keyboards. Second, the last QWERTY I got from them crapped out in a really disappointing way. I had a MyTouch 4G slide, also known as the HTC Doubleshot. Really nice phone, decent modding community. The thing is, it's got a design flaw. The flex cable between the front and back halves of the phone failed, causing a whole basket of things to go wrong. When I disassembled the unit, I could clearly see how the edge of a metal bracket was rubbing against the cable every time the phone was opened or closed.
If you've got a HTC Doubleshot, it's just a matter of time before it fails. I'm sure the design engineers recognized this problem but they likely had their fix overruled to save production cost or hustle the unit out the door. Worse, it could have been planned obsolescence, given that the problem manifested a month after the warranty expired.
Meanwhile, my HTC Dream is chugging along with new old-stock units available for $90, and HTC has walked away from the one thing they did better than the rest of the industry .