I've been a Paypal user for quite some time (years) and never had a problem with them. But reading this prompted me to do some surfing. There seem to be quite a few sites and forums dedicated to warning people about Paypal transactions that have gone bad, including Ebay's own forum (who own Paypal).
This has prompted me to head out tomorrow and start a new account for checking/savings and leave the existing account for Paypal-only transactions. At least if a customer makes a fraudulent transaction, a chargeback or claims non-receipt of goods it won't affect my personal financial situation.
Thanks for the warnings, and exotica - love your site and your art. Keep up the great work. =)