Baroque music is nice to listen to, but listening to that type of music (no offence intended at all, I love it!) for a while it starts to mess with your mind a little (at least for me) so that's why I prefer something very relaxing but still complex, like Chopin nocturnes but nothing too chordal. I'm really sounding sounding like a nerd here, but Tchaikovsky's D major violin concerto always fixes me into a jolly mood, and I seem to love studying then