I only have three save files at the moment.
1. My first farm, run to Perfection
2. My second farm, started to try another marriage candidate and the Joja Route. Either at Perfection or nearly there.
3. My first modded farm, featuring Gaston
For Farm 2, I wanted to try another playthrough now that I had played the game once and started to have a good idea of what to do in it. I tried a few self-imposed challenges, including catching all fish in Year 1 and using 50% profit margins. I made it work pretty well and it got me started on fun and quirky play styles.
For Farm 3, I wanted to try out mods (Stardew Valley Expanded, Automate, a bunch of Quality of Life mods (skill XP bars, Daily Screenshot, button to add to nearby chests, etc.) but nothing too cheesy (Chests Anywhere and the "Easier Fishing" mods, I'm looking at you). I was getting bored of playing as myself or some generic guy (which if we're being real, I suppose I am) and realized how funny it would be if I tried to play as Gaston from Disney's Beauty and the Beast while being as true to his character as possible. You can make a fairly convincing Gaston using the clothes available to start out with, turns out.
For the as-yet-unmade Farm 4, Gaston is in Fall Year 3, and I'm starting to get ideas for another character-based run. Furthermore, I've been looking into additional mods to add to my game (and I have some mods I want to remove) as well as some alternative farm maps. So I might put the Gaston savefile on hold once it hits Winter and move on to greener pastures more flowery fields. I'll post that one in the Farm Showcase forum once I start it up, which might be anywhere from days to months from now. Expect lots of sunflowers!