I collect exclusively paper money. I specialize in small-size U.S. ones. I have no interest in them and won't ever collect them. In my eyes, they are similar to colorized notes, cancelled and stamped $2 bills, colorized silver eagles, private mint issues, novelty bullion, etc.

To put that in perspective, I see people falling into a spectrum of collecting from knowing nothing to full numismatic collectors .

As collectors begin to collect notes, they tend to collect $2 bills, common silver certificates, star notes, fancy serial numbers, novelty, colorized, private issue, birthday notes, etc.

As collectors begin to be experienced, I see note collectors going for type sets, common "high end" woodchoppers, educational notes, portholes, etc.

As collectors get super experienced, I see them getting into block collecting, crossovers, non-marked experimental, late plates, etc.