I've got some further posts percolating with regards to this serial enthusiast notion - but as The Date is fast approaching (7 days!), I'll repost a comment left on Anne Zelenka's blog:
I’ve been lucky enough to find someone who’s not only tolerant of my serial enthusiasms, but apparently enjoys being around me. And, I’ve found that in her case my enthusiasm has only been constant and growing and shows no sign of wander. Alexandra’s been a daily source of novelty to me, so I think she’s one rare case wherein I’m happy to tie up loose ends and commit to a lifetime of future support.