My modded switch paid itself off pretty quickly with how much I was saving - so yes, definitely. Even if you aren't planning to mod - its still a pretty good system.
I'm not one to self insert honestly - so set personality is my preference.
I also prefer set personality because of how I feel it impacts fandom interactions. In fandoms of games with blankslate-mc's Ive noticed some (not all) take the games content and actions of love interests more...