I really love the platform game genre, I think it's my favourite out of all of them. I still can't decide which game is my favourite so I'll list a bunch of them.

Ruff 'n Tumble
Zool 1 & 2
Bubble 'n Squeak
Mr Nutz: Hoppin' Mad
Brian the Lion
The Chaos Engine
Lionheart
Leander
Whizz
Superfrog
Bubba 'n Stix
Wolfchild
Fire & Ice
James Pond: Robocod

There's so many more, but those are the ones that jump to mind first.