I'm an active user who post and comment regularly, and I would say that the experience is very similar to Reddit. Except for less adds and smaller numbers on the main/all page. The experience is probably very different if you're mainly a passive consumer of content.
Though I've never been active in "large" subreddits and I tend to block them from my feed. So guess I don't know what I'm missing.
This is about right. Its a great general interest thing and you have some really great folks but you don't have a ton of pathfinder people talking about pathfinder or sto people talking about sto on an sto sub, etc. so we have a general gaming community that is pretty active but if you want to know day to day whats happening with a particular game. not so much.