My wife does not play much as she (in her words) "does not know what to shoot for". However, she does enjoy playing IronMan and Tron. Why? She likes the themes (mainly IronMan) and feels that she can make some progress (fun) without having to understand all the rules. She also likes the fact that ball-times are relatively short as she is not an accomplished player. She also likes LOTR but finds it overwhelming and games are too long (which for her is anything longer than 5 minutes).
She hates Congo, WPT, Road Show, STTNG (likes the theme though), TZ, JM. She also liked the older EMs when I had them (as she liked the sounds and chimes as well as the simple rules).
I am just glad that I managed to find a few games that keep her a little interested. It is nice to be able to share a little bit of the hobby with her. We both have quite a few common interests so I am ok with pinball being more about me. She also enjoys playing them more when we have friends over to play (as do I for that matter).