Um, no. I collect cartridges. If one has a tendency to hoard, this is what you want to hoard. My vast collection still fits inside one U-Haul medium-sized moving box. For me and my life and my family's health, it's much better than collecting cats, dogs, cars, power tools, turntables, clothing, shoes, kitchen appliances, knick knacks, radios, clocks, furniture, hats, bobble heads, sports memorabilia, books, lamps, typewriters, cameras (I speak from experience, here), tea tins, teacups, glassware, beer steins, stereo separates, 17th century ladies support undergarments, guns, fountain pens, Medieval torture devices, feather quills, historic documents of national interest, Civil War memorabilia, Dixie cups, vintage computers, musical instruments like guitars, calculators, architectural drafting equipment, farming implements, highway signage, dolls, used dental floss, toys, signs, any of various small nocturnal rodents popular with pet lovers, even LP's (basically all that stuff you see littering the wall display shelves at T.G.I. Friday's) and *ahem* girlfriends and especially offspring (at least with my budget). I don't have a ton of stereo equipment, either and my speakers are only bookshelf speakers--besides the woofer.
About the only thing I can think of that one could collect that is so small and yet have so much fun with might be souvenir thimbles, paperclips, used staples or spoons, lug nuts . . . maybe Hot Wheels.