Should I read the manga, watch the anime, or both? Or does it just come down to medium preference?
I thought it was pretty average overall. Personally I wouldn't even bother. Most people recommend the manga over the anime.
Do both, they differ greatly since the beginning, I prefer the manga because it has more character development overall. As a whole, Bokurano is not that great or outstanding, but if you enjoy it you should check Wings of Vendemiaire and Narutaru, by the same author.
Manga it is then, thank you.