Sonic Faces- Aside from having amazing artwork its also a pretty fun layout. I always loved the backglass and turned one down about 15 years ago. Luckily I found one for sale locally about 3 years ago and bought it just for the colorful bg and pf. I cleaned it and tuned it up and it is one of my more popular ems in my collection.
I had some friends over last year and had 2 tell me how much they enjoyed wms Travel Time. I have always thought it was the best timed pinball made and very different from your traditional 3 or 5 ball em games from that era. I have had a couple games that have lasted over an hour .
There are lots of great em games out there and these are a couple of my all time favorites.