In Japan, I thought festivals were cool. Probably because they weren't surrounding me for days at a time. Here, I hate 'em, because every year there are several festivals and parades that screw up the roads and parking and basically trap me at home unless I want to deal with massive traffic.
The North Beach Festival is the worst, since it literally surrounds my place. I'm not enamored of the Columbus Day parade, either. Chinese New Year parade I tolerate because I found other things to do during that time.