I would keep your TAF and STTNG and add for all the non racy pinheads and non pinheads that play your games
3. IM - good players love this game and non pinheads love this game and they can play together
4. WCS - so approachable. The best family game ever? Goal!!!!
5. RFM - different, great humor and video/pinball concept is awesome. Can you imagine all pins like this today?
6. ST Pro - with the new awesome update that is here! (Edit)