If No More Heroes' challenge had a flavor, it would be quite delicious.
If Persona had a taste, it would a totally fucking awesome collection of uniquity and WTF into one religious dish that takes 45 minutes to finish the last bite, and makes you sleepy afterwards. And it may fuck over your opinion of most modern dishes pretending to be new and good, *coughs up a chunk of FF XIII* so yeah.
RPGs in general would be like shrimp crackers. An aquired taste, and people may wonder how the fuck you like them.
FPSs would be McDonald's. Occasionally there'll be a McRib of awesome-ness, but half of the time there'll mostly be crap that people'll keep eating for no reason whatsoever.
RTS would be like ramen, sustaining, delicious because of MSG, and full of shit to give you high blood pressure.