Sometimes I hear something, fall in love with it and then it turns transparent after a while and I get sick of even recalling it. Sometimes I hear something I quite like and after more listening, it grows on me more or I notice things in it that I didn't hear before. Every now and then I hear something that radiates pure musical brilliance and I am instantly and eternally in love with it. Music does a lot of different things for me, so there are also a lot of different things I can like about it.
In regards to how I find music, I simply keep my ears open. There is no limit to how much music I can listen to, so I simply go by any means available to find new sounds, or more of what I know and love.
One very productive way of finding new music for me is via my last.fm account. If you see an obvious correlation of certain music you like in someone's library, they probably listen to a lot of stuff that you will like. Sift through their library and see what you can find, maybe even drop them a 'hey, can you recommend me more music that sounds like x?' message. Last.fm is often viewed as a place for elitists and hipsters, but I think it's underrated for people that really love music and make a hobby of listening to it and discovering more of it.
One 'golden rule' I keep is to never give anything less than a fair chance. If someone recommends you something or if a name pops up to listen to, don't pass it up because it's of a genre you look down upon. As I said in the thread discussing 'overrated / boring' genres, correlation does not mean causation and you will be surprised by how many invisible doors can be opened for you by listening to one or two pieces of music that you would normally refuse to give a chance.