4-5 for me
On-one pomp for commuting
On-one 456 general trail centre, eduros etc.
Scandal 69er rigid SS light weight low maintenance for gentler touring rides. (Sorry bit of an on-one fest but they are tidy frames, well designed and good value.)
DH bike Giant Faith (old style) for DH upift days
Just built up a hack rigid SS out of parts lying around for general rides with the kids on the wee ride.
Horses for courses. I use all of the above for different rides through out the year. I think I'll stop at that though.
I enjoy fettling building up bikes, looking for bargains parts as much as the riding.
I am running out of space though so I'm having to build a garage.
THe wife's not happy about the amount of bikes I have.