The only thing Billy liked more than his music was having an audience for it, but he was an exacting and passionate musician and that tended to get in the way of the final product; he wouldn't settle for 'good enough' when it came to music, and it drove some people absolutely crazy. In fact Merc had threatened to murder him more than once. He was almost sure it had been a joke each time, though.
He had tried to do some writing in his head, and while that worked for bits of lyric here and there, it didn't do anything for rhythm and without Merc he wasn't all that great at melody. It was incredibly frustrating to hear a tempo in your head and not be able to get your limbs to create the sound at the right pace.
"Travel?" Billy asked, interested to know where the other man had been and where he was going.