I'm also searching for my first pinball machine. Yesterday I went to see someone that rebuilds these machines and sells them and he had some 15 machines there to try out.
It's my first machine and I don't plan on collecting them (ahem...) so I want this machine to be perfect. I read reviews, checked out the Top 100 and watched Youtube video's of pinballs until my wife actually thought I owned one, but actually touching, seeing and playing one is the best test. I want a pin that plays nice, holds it's game fun as good as possible, but is also a nice looker and has an appealing theme. I played Road Show and found it to be a very nice game, but I hate the looks of this machine. The two heads make me think of the Chucky movies and I think it's creapy
I also played Terminator 3 and that was a very nice machine to look at, perfect theme, but a less entertaining game. I really like the flashing lights going around the table. Twister was a very nice pin too, but a game that is too fast for my taste. LotR was both attractive and fun to play, but was out of my league moneywise
I ended up with Star Trek The Next Generation getting the most points on all fronts (for me). Very entertaining game, appealing theme for me and quite a nice looker too, although I miss the real flashing lights action and the "cool looks" that T3 has. I also wanted to try out Twilight Zone, but he did not have it there. In the next couple of days I hope to make a decision on which machine to buy!
Look, feel and play. That is the only way to find your taste in pinballs. It's hard though, because I don't know many people that have (a) pinball machine(s) and are willing to let you play them.