Most of the jobs I do use an arranger, but at home I'm usually working on piano, guitar, harmonica and drums. Most my time spent on an arranger at home is preparing for jobs (new songs, finding styles, sounds, making registrations and organizing styles. But often I do play arranger at home "just for fun" especially when friends/family come over and want to sing, dance and have fun, so yes, I think I'd always like to have an arranger KB around even if I wasn't playing out.