I am. Unfortunately I don't have the money to support my habit, there are so many I want. I have three now. One (AGV R7 circa 1997) is pretty old and I don't wear it, the next (Arai Quantum e circa 1999) I wear it at trackdays (it matches my 1-piece suit which matches my bike [cheeky]) and my everyday helmet (Arai RX-7 Corsair Shinya Nakano replica).
If I could afford I would get:
Arai RX-7RR Nicky Hayden Laguna replica
Arai RX-7RR Colin Edwards Laguna replica (in wht/red)
They're kind of like adult baseball trading cards. If my wife wouldn't kill me I'd love to get a bunch of replicas and find somewhere to display them - some are works of art in their own way. To her defense, she did buy me a Rossi Replica as a holiday present last year.
Wouldn't it be cool to have replicas for each of this year's top 10 MotoGP. Of course, given unlimited funds it would be even cooler to collect the actual bikes.
I went to a party at Wilzig Castle (Southampton) a few years ago and wandered into the garage. Sir Ivan has quite a collection of Ducs (classics, new, track, street) 20 - 25 of them and if I my memory serves me correctly, a few MVs - luckily I wasn't driving that night and could drown my jealousy in a bottle of tequila.