Quoted from Otaku:

I agree. The fact that any group of people here dictate the "good" and "bad" games is nonsense. It's funny, you can post a photo of one game and then another, one of the overpriced cliches, and watch it get like 10x more upvotes.
Pinside cliche "get upvotes fast at the cost of emptying your wallet" list:
EM: Atlantis, El Dorado, Abra Ca Dabra, Centigrade 37 (In addition to those titles, there's a huge "Gottlieb single-player games are the best" circlejerk, I love them too and respect that people have their favorites, as we all do, but some people have their head so far up their rear that they absolutely despise (and some even publicly insult) any other games, which in my opinion a closed mind is the worst thing to have in this hobby!)
SS: Fathom takes the cake (especially due to the awful pricing), but arguably 70-80% of the Bally solid-states (Mystic, Frontier, Embryon, SBM, Vector, the list goes on), Funhouse, Earthshaker, Whirlwind
DMD: Medieval Madness, Monster Bash, Addams Family, CFTBL (and perhaps Metallica, but it's still new and I think a lot of people genuinely like the gameplay and I've heard very good things about it from people with very diverse collections, and the prices aren't inflated as it's still being made new, so can't/won't really add it to the list)