Haven't read the whole thread so I'm sure some of this has already been posted.
I agree with others and figure out what your target audience is going to be. If it's going to be adults a couple of pins and some older games would be a good idea. The issue with pins I could see is that people will play them, but they require a lot more time and maintenance. You might get a little more traffic too, by advertising on the forums and such that you have pins and games to play.
If you have a decent fighting game scene around you, you could always get a few of the more popular fighters, and let people know. You could even have tourny's, and just charge and entry fee or something.
I don't really know how SHUMPS earn, but they are fun, I have heard they don't earn very well though. I think drivers and gun games would be a great idea as well.
If your primary attendees is going to be children I would probably get more crane, redemption type stuff. Maybe get a few other games for the parents so they can play a few games of something.
I wouldn't let what people on these boards, or hell even what you think you want to play, determine what you put in your arcade. If your trying to make money, get stuff that will make you money.
BTW I'm not an operator, this is just stuff I have read, and heard over the years from people that run or used to run arcades.