My Favourite is probably Estranged, althought i go through phases, i used to like Coma, November Rain, Sweet Child also by GnR, then Aerosmith ones like Cryin, Livin On The Edge and Toys.
I like Estranged so much cos it just flows, from one part to another, the guitar stuff at the beginning is awesome, then the piano part, then the Solo, dolphin noises then final solo. Its all so amazing!! Plus the lyrics are so true!! What about the dolphin noises slash does!! theyre so cool, i play em on my guitar to sooth myself!!
If you havent heard this song then get it!!

Later Axl