Yep, played them all, those are my favorites of all the ones I have played. My avatar, and my two sig images are my top 3, in left to right order.
It depends on what you're looking for. I like romance stuff, solid routes, good story, and I don't put too much stock in lewd things. Even Harem Hotel (and I've been DEADSET against those types of games for a long time) has some wonderful stories in them and I do have favorite girls in it.
I pick a girl in a VN that I like, play the game, and if it's what I want, I stay loyal to that girl and that route for that chosen game and I never stray. I don't like walking hard-on games. So it depends on what you want; story, romance, lewds, emotional, etc. I'd say the games I have listed pretty much hit all those categories in their own way.