Twilight Zone
Tales of the Arabian Nights
Creature from the Black Lagoon (WIP)
The Addams Family (WIP)

I've got space for tens of games, but I don't think hoarding is good. I'm getting rid of CFTBL anyway, don't like it that much. There's only two reasons I'd keep a pin: a) I love playing it, b) it has some sentimental value. I keep TOTAN for the second reason as it's the game that got me into pinball. I wouldn't want my collection to exceed 5 games, servicing and maintaining 4 is already burdensome. Once I drop CFTBL I've got space for 2 more, wishing for MM and ToM. There are other great games out there, like CC, MB, or STTNG, but I don't like them that much as to necessarily have access to them 24/7.
This one time though, I saw a guy in Holland selling one of Gene's Illinois Pinball BBB's for €32000 and I was really tempted to sell my collection and get it. Glad I didn't though.