I use to keep track when they first came out, think I ahd about 20 states but lost interest in it. I mostly collect gundam models and anime figurines now.
I collect anime figures and also just started collect warhammer 40,000 stuff and I also have the dawn of war games(their linked to warhammer)
I collect money and coins... old and new ones.... I have so many coins from so many places... and also 2 dollar bills....
I use to collect them all the time, I had about 30 then I gave it to my cousin so she could finish it since she wanted to.
Moving to the cyber lounge...
I think the title is a bit too general if you meant this topic to be about the State Quarters ^^;
That in mind, I have all the quarters out from 1999 to 2005 except for two - Maine and West Virginia. I've yet to get any of the '06 ones... slacking a bit ^.^ To track them more easily I have one of those quarter maps - a standard one, as my mum's friend's little girl has a map with 2 slots for every state (for the D and P mints)