If I've already heard the album, then yeah, I'll skip all the songs I don't like. or I won't even have them on my computer. But if I've never heard it before, I'll listen to it through one time without skipping.

if i've not heard anything of them then i'll shove them all on to my playlist and listen to them all

I'll only listen to some of a song to test whether or not I like it, initially. I'll fast-forward to the chorus too. Of course, I don't always do this...with new Ayu songs I generally listen from start to finish.