I typically work alone just because it's most convenient. I have a moderately unorthodox way of going about development so burdening others with that weird cycle feels almost cruel.
I do like the idea of teaming up, especially for game jams. I just have to actually do that some day
Sounds like me as well haha. Then comes scheduling and committing to putting in the time or not doing anything and possibly annoying the other person (especially if you don't know them that well yet).
Same here. Also the self-taught nature of my skills probably makes me do many things the wrong way, and I don't wish that kind of scrutiny on myself :D
I will also often take long breaks from projects but usually come back to them eventually. And that is much harder to do when not alone.