I had DroidMod on my D1 a while back and was very happy with it, but I've been running stock since the FroYo update. I'm getting more and more unhappy with how slow my phone is running- not sure if it's actually getting slower, or if I'm just less patient with it, but either way something has to change.
I don't want to fuss with changing roms, kernels, etc every few days. I don't want to see frequent reboots or FCs. My phone's OS isn't a source of entertainment for me; I want to install something that will "just work" and then not think about it until it's time to replace the device later this year.