I like seeing the work those guys put in to that. My current (admittedly lazy) tendency is to use whatever default serif/sans-serif the user's browser has set.

I like seeing the work those guys put in to that. My current (admittedly lazy) tendency is to use whatever default serif/sans-serif the user's browser has set. My reasoning is that if the user cares at all, they've set that font. Otherwise it doesn't matter. I might use one of those font stacks instead in the future.