Can/will only answer 1 of those 3 q's though sorry. First one I won't answer because it's excluding & I find reading others singling members out to be VERY triggering for me.
Rather not say why I can't answer #3 but maybe it's pretty obvious anyway.
As for #2, what has SF done for me, it's done lots which is help me feel less alone, find other people who have felt similar ways to me and helped me realize that not only am I not alone with things I've thought and felt but there are others who have even worse and more stressful lives than me. I like that it has a games forum & the diary forum too I find them helpful & am glad the SF creators realized the importance of allowing members to make those kinds of posts Glad this site exists, whether a person ends up being very "popular" here or not it is just good & comforting to know it's here.
1. There are just far too many for me to be able to single out one person.
2. SF has been a lifeline for me. It's given me understanding and empathy when it felt like the world didn't get me (or I didn't get the world). It's given me a totally safe space to talk and support to understand my thoughts. But most of all it's given me friendship.
3. A 1971 Triumph Spitfire Mark IV. It was off the road far more than it was on it but we had some fun times.