In my experiences, weed simply enhances whatever you are already feeling. This seems to hold true for psychological states as well as sensory input.

If you're already anxious, you'll become more anxious. If you're relaxed, you'll become more relaxed. If you're drunk, you'll be more drunk. Food is tastier. Music is more musical.

It just makes everything more. As a once in a while thing, I find this enhancement useful.