All things Arfenhouse.
And "There She Is!", both parts.
Also, pretty much anything by David Firth, in particular Ptikobj and the Salad Fingers series.
Go google them, lol, I can't be bothered to link them for you.
[EDIT] HOLY SHIT P.P.A. that Mario one was EPIC.
P.S. Leekspin is the shit.