That would be your best bet- Try a number of them to get a feel for what you are looking for. I did it the hard way purchasing a bunch of games (over 32 at this point), fixing them up and and then playing them and moving along the ones we didn't like. Still doing that as a matter of fact! We went to Pinside this year to try several titles so keeping an eye out for those we liked.
Single player games tend to have more depth than two or four player games (with very few exceptions) and some brands have strengths others do not. People talk about how Gottlieb are the best but currently there is only one Gottlieb (Domino which in some ways is very Williams like) in our line up that has made the cut. We prefer Williams pins the most with some Bally and a Chicago Coin thrown in. Neither my wife nor I care for banks of drop targets, other people love them. Gottliebs do have very nice chime boxes if sound is important too you and I'd wager that sound is half the experience when it comes to EM's. I spend a lot of time on the Williams chimes so they don't sound as clunky as is common after years of being hammered.
Our current line up:
Star Action (great speed, flow and colors)
Ship Ahoy (outgoing pin, great chimes and 2 ways to light the wows)
Heat Wave (lots to shoot at, backglass animation)
Domino (speedy pin, awesome bells, challenging)
Moon Shot (Great 4 player pin, 2 inch flippers)
Ding Dong (another challenging 2" flipper pin, light the board 4 ways to get specials)
Night Driver (Another simple 4 player pin, drop targets for add a ball, great chimes)
Darts (nice old "woodrail", challenging, sounds great)
Olympic Hockey (one of our fastest EM, great 2 player with lots to shoot at, backglass animation)
Triple Strike (nice bowling theme pin, little slower paced, backglass animation)
Space Odyssey (More toys on the pf than you can shake a stick at, 2 player)
In the repair garage, playable:
Touchdown (very fast single player football theme, backglass animation)
Bazaar (Complex for an EM, lots going on with zipper flippers for the win!)
Bus Stop (2 player, brutal outlanes, carry over bonus you can steal from other player, charming theme)
Grand Tour (another charmer, carry over feature, great layout)
Hope this helps.
P.S. I will warn you that EM's can be fussy at times. Some games require little maintenance once they have been gone through, adjusted and cleaned. Others...well there always seems to be one or two that I'm under the hood tweaking a switch, lubing something or adjusting a stepper. They are very complex mechanical devices that are 40 or more years old so be prepared to get your hands dirty time to time, all part of EM ownership.