What do you like most about a song?

Is it the melody, the chords, the backing music, the lyrics, the bass..?

For me I like the chords the most, with the melody at a somewhat close second.

The chords, the beat, and the bassline, the solos, the melody...

edited 13th Aug '13 2:06:10 PM by PhysicalStamina

Guitar solos. I am a sucker for them. A good chord progression is also important.

The structures and the composition, although this is mostly more for music with more abstract and unusual structures.

I like any song that has a good, solid beat.

Any song that has something interesting in its sound. I like unusual instrumentation, creative arrangements, solid melodies, nonstandard chord patterns, big harmonies, etc.

I also like songs that have a Subdued Section and then a big buildup at the end. "I Will Wait" by Mumford & Sons is a pretty good example. That song also has neat instrumentation, with the banjo runs underneath what's otherwise not that country-sounding of a song.

Generally, vocals can make or break a song for me. I mostly like stuff that just sounds good to me, but ultimately, if I don't like the vocals, I don't like the song.