When I can pull myself away from Arbans and pedal tones... I enjoy working out little bits of trumpet/other horns in contemporary or popular music: like the arrangements on both of the Bon Iver albums, or little bits from more commercial/no traditional trumpet music. The drummer from the Manic Street Preachers (a band probably only known to European/UK readers) is also known to whip out a trumpet and plays a brief solo on "Kevin Carter".
Some of The Cure's instrumentation involved some nice trumpet playing- the duelling horns on "Close To Me" sound great, though I haven't worked out the trumpet part, yet!
Is it just me or does anyone else do this: and what sort of stuff do you like to work out?