Sour- I'd say lemons Sweet- Strawberries Salty- Potato chips Spicy- So long as my mouth isn't in need of the local fire department, anything Bitter- I dunno.
Sweet is good, but in some junk foods like cupcakes, its soooo sugary its disgusting and makes you want to throw up.
Sweet would probably the #1, it's called sweet for a reason =D
Sour is only good for candies and things, because I wouldn't want sour meat....EWW!
Without salt, most foods would be bland and tasteless. Saltiness is maybe the most important in chips. Chips are good without salt too so I don't know...
I personally don't like spicy, but spicy foods are great in little amounts.
