Every time I get full of myself and think that my opinions and likes are the best, my family is there to remind me that I'm not as great as I think and that I should expand my horizons. I may not like a lot of what my kids do but I do enjoy seeing them happy.... being truly happy is sorely lacking from a lot of adults lives.
I spent years swearing off groups and overgeneralizing ("thug rap"/"crap"/etc.) instead of actually enjoying myself. Plenty of groups like Tool, Can, Primus, Rush, etc. turned out to be really good except I was too much of a self-involved dick to think otherwise.