As a general rule of thumb, look at my stash and subtract 20 and that number will equal "too many" according to your family and friends.
According to me, "too many" doesn't start until I need to rent a separate storage facility.
I only have one F.1 (Encore, Voss, with Pheon/Aviattic decals and figure) so far, but I expect to get one for each of the Richtofen boys at least. And I'm not even particularly *interested* in that bus...
(If ever there was a place to have your hoarding habits affirmed as normal and even a valuable contribution to society, this forum is it!)