Shenmue is the only reason I haven't sold my DC. I played through a couple of months ago, and intend shortly to start up again. It's impossible, I know, but I always try to recapture the magic of the very first time I played. I never skimp through it, I always go for the full complement of conversations (although I admit I bypass the gossipy housewives in Sakuragaoka these days.)
I never stop playing either game, after I finish shenmue 1 I go right to shenmue 2 after I finish shenmue 2 I go straight to shenmue 1 and it just keeps going like that, I never get sick of shenmue.
I've got the Dreamcast set up so i just play it whenever, usually every few days for an hour or two. Started playing through Shenmue I a few weeks ago, decided to take it slow and check out everything (i've just started Disk 2).