____ or ____?

Raven Riley

Like food in the Microwave or Oven?

oven food

Matt Damon or Owen Wilson

Matt Damon, one of my favorite actors.

Will Smith or Tom Cruise?

Will Smith- Tom Cruise hasn't really done anything lately worthy

Walter Johnson or Cy Young

Walter Johnson, have no idea who Cy Young is

Navy or Marines?

Marines, Cy Young has the most wins ever by any pitcher btw

Air Force or Army

Air Force, because Army and ND are big rivals =p
Probably not what you meant, but to bad.

Eat a decent sized spider or a cockroach

Spider. You unknowingly eat them in your sleep, so oh! XD
...*shivers at the thought of cockroaches*

Car or truck?

car, trunks are for rednecks = )

hmm,

Laptop or Desktop

laptop. 'cos then i can watch tv and surf the net. or play games in bed.

a barrell of fish or a box of snails