I've been surprised at the kind of music I've been introduced to and come to like as a result of this show.
New songs that have brought a new artist into my collection (Roisin Murphy - most notably for the Ramalama Bang Bang group number from season 2, but also Night of the Dancing Flame from Neil & Lauren's jazz number, season 3, and Ruby Blue/thieves number by Jeanette & Brandon).
Songs I might have heard, said "meh" but now love with the visual of the routine to go with it (Bleeding Love by Leona Lewis from Mark/Chelsea's Hip Hop on season 4 most notably).
Songs that are absolute favorites just based on hearing them on the show (The Moment I Said It by Imogen heap from the season 3 group routine, Dancing by Elisa from the season 3 Lacey/Kameron contemporary)
Even some of the Latin numbers have given me a totally new direction to explore (Club Des Belugas : Hip Hip Chin Chin from the Lacey/Danny Samba).
How has the music of SYTYCD affected you? Favorite combinations of music/routine? New styles/artists you either didn't know existed or didn't appreciate the way you do now? Songs you now listen to regularly that you didn't before SYTYCD... etc.