- interesting level design (including lots of hard-to-find/access areas),
- good graphics (not necessarily colorful) with distinctive style and interesting theme (for example I like the ancient motives in gods). I prefer "dark" over "cute". If there is cutesy then it is good when it has some darkness in it or a bit of madness (james pond),
- I like it when there is a lot of items or vehicles to use,
- adventure elements (actually I dont like "the real platformers" very much) .