[scottwick]

I totally agree, they're really great for simple hobby projects! I've mostly used the ATTiny85 and it's easy to understand the datasheet, easy to program, battery efficient and comes in a DIP-8 form factor for easy breadboarding. Compared with something like an STM32 I find it quite fun to work with!

[brokenmachine]

I find the ATTiny85 difficult, since you have to connect a programmer to it.

I tried the Digispark clones but then you lose the low-power advantages.

I'm usually trying to work out problems with my crappy code so I need a connection all the time to iterate. So I prefer the ESPs or Arduino Pro Micro.