I think sometimes you can get so used to the way you yourself sound when you play that you become cynical or jaded about it, but it doesn't necessarily sound boring or rehashed to others. Unfortunately I am very affected by the input of others, but I find that if you can find people who like to listen to you play, even casually, it can help you get out of your own head and appreciate your own playing again.
My style is generally just open chords (although I like songs with lots of chords) and I do a lot of hammer ons, pull offs, and little variations within chord progressions to create melodies within the rhythm if you know what I mean. It's very country folk I guess and pretty simple, and can easily start to sound to me like something no one would want to hear. So for me, playing only in my room by myself with no one around to give me feedback is like my biggest enemy
Fingerpicking can get really complicated, but you only need to know the basics to make it sound good (like many aspects of the guitar I guess). I only use my thumb and first two fingers which is like totally bad form or whatever, but it's good enough to play any SP song with fingerpicking for example.