Not sure about a top 10 , but these are some of my personal favourites that I do own

Firepower (great game and sentimental reasons)
Creature from the Black Lagoon
Playboy (sentimental reasons)
Black Hole (still in pieces and a long term basket case project)
Lady Luck (Williams 1968)

Wanted

Rocket ship (Bally EM)
Space Shuttle

Should not have sold

Old Chicago (Bally EM)
Gulf Stream (Williams EM)