LOL!!!! Interesting to see you start this thread
For what it's worth, I think it depends on the time commitment and whether you have enough..... 3 bands that only gig occasionally and rarely rehearse would be less intensive than a band that rehearses every week and is gigging every weekend.
As you know, I am needing to review my situation as am currently in two bands that both rehearse every week and one that has started gigging, one which is going to start in June....!!
Take next week.... Monday, bass lesson, Tuesday, learn material for band 2, Wednesday, rehearsal band 1, Thursday, rehearsal band 2, Friday, gig band 1. So, time wise (with other things going on at home too) I'm going to have a pretty hectic week! So for me, I need to make some serious decisions!!