I wouldn't say I regret owning any pin, but there are several I was really glad to see tha back of! The good thing about owning them is I got to play them and to realise I don't want them again, so no regrets there... Ones that had to go are Striker Extreme, RCT, Tron, Dr Who, RFM, Twister, TFTC, TAF... the list goes on