I still haven't watched all of it - RG and I were at one stage working our way through (he's seen it all at least once) on Friday evenings, but have got sidetracked recently by catching up with Series 1 of Mad Men. (This being the one hour of telly a week we generally carve out to watch together!)

One of the great pleasures of Firefly though is the way that while there are lots of long character and story arcs, each ep is usually to an extent complete in itself, so you can enjoy watching them on a piecemeal basis.