Asides from my judgmental father, pretty much everyone around me knows I'm a brony. My mom does, and is into it too because of me, so is my sister and one of my close friends. Her boyfriend knows, their friends who live with them know, my best friend knows, etc. So, yeah. Basically everyone I interact with on a regular or semi-regular basis knows other than my dad. I don't think he'd flip or anything, but he'd just make fun of it, and even though I'm not scared, I simply don't have the patience to deal with his bullshit. Why tell him when he just doesn't need to know? I hardly have anything in common with him anyway and I don't live with him anymore xP
Anyway, yes, it was a positive experience, and I wouldn't change becoming one at all.