I had a CoCo and a bunch of games (including Dungeons of Daggorath), but ended up selling it. As far as classic computers go, the CoCo was pretty weak games-wise. It just didn't compare to Atari or Commodore or Apple. In both quality and quantity of games. There was one game in particular that had two dinosaurs fighting that was just pathetic. Add in floppy non-centering joysticks... And also finding games was really difficult.
I'm usually not so negative. In fact, I own and kind of appreciate a Mattel Aquarius for gods-sake! But for whatever reason, I just never warmed to the CoCo. Oh! One more thing....the fact that they picked puke green as the color when you turn on the machine was just awful. Who would do that?
In the end, I decided to sell it and haven't missed it at all. I say you enjoy the games you want using emulation and stop kicking yourself.