I agree. Mods do add replayability and can future proof a game, so having mods with Stardew Valley has been amazing.
It is fan art of Abigail :) but it's not mine. She's my favorite character too. After I started modding I realized that she is basically the most developed character with more dialogue lines than most other characters. Maybe shes a common favorite for that reason!
I know there are some games that without mods I probably would have given up on long ago. Not only can they expand upon existing content and add all new stuff, but they can fix problems or just alter things that you might not really like. For me the best example of all of those things are the Sims games. Mods can really change those games while adding in new stuff as well, and without mods I doubt I would have kept playing them for all these years. Plus I can actually make my own tuning mods for some of those Sims games, so I don't always have to rely on someone else to modify every little thing I may want to change.
Ah so you stole it! Nah I'm just teasing. It is nice looking, kind of makes me wish that was her in-game portrait. Admittedly one of the reasons I like her character so much is that she reminds me of myself in a way, and she just seems like my kind of person which is why I had my guy marry her in my first save. I think you're right too, she does seem to have more going for her than most characters so she does stand out for that as well.