My first MMORPG was Ultima Online, which I started playing some time in 2000. My first tabletop RPG was AD&D in 1979, I dunno offhand if I would've given UO a try had I not been a gamer - I know that a lot of my initial interest in the MMORPG concept was due to images I had of a 24/7 D&D campaign. Of course, it didn't turn out to be anything like that, but I found I enjoyed that type of game on its own merits. I've had a couple of breaks in MMORPGing since then - longest was about a year - but most of the time I've got some game or other on the go.
Since UO, I've played Asheron's Call (only for about four months), Dark Age of Camelot (a couple of years), Horizons (about a weekend), City of Heroes (on and off since launch), Lord of the Rings Online (ditto), and Guild Wars (a weekend every now and then). I've recruited a few people I know from MMORPGs into virtual tabletop D&D sessions, and two or three of them liked it enough to buy the books and find a local game.