Grind is pretty good.
Output 1 2 - Not sure about that break in there but the beat is not awful. Needs more development, it missing something.
Air - I beg to differ. Air is some post apocalyptic ish. The only thing about it is we've heard that (classic or played out) breakbeat before. Maybe if you chopped up the break and rearranged the indv beats or something. Put a melody under it...?