I've done the 91/135 thing - then 121 for many years - back to 91/135 during Covid.

Hands down 121, I CAN NOT WAIT to get back to the reliability of a 121 schedule. Sure it varies occasionally and sure you may not get the line you want. But you know your show times, days off are off. When you get to the hotel you're off until your next show time.

91/135 has perks, rental cars, pick your hotel, nice FBOs and expense accounts. But I only get paid by the day - so they have to call - and scheduling a family around IF they call is crazy. Fortunate to not really need the charter gig so I've been clear about unavailability for pop ups.

Obvious to each their own, but 121 is a MUCH better fit for me and my family. (not to mention pays WAY more in the long run)