I don't myself, but a good server : rawr.lethargiclion.net super friendly, anti grief, hug community super nice and stuff ( like, if you need a fuckton of building stuff they'll give you some
I'm trying to get back into sp again, i became pretty addicted to mp for awhile. I usually build one home, then build a portal, GO A FUCKTON AWAY, and teleport to a new area and build there :3