I think that answers to this poll may be influenced by preferred syle of music. For example orchestral players generally but not allways play Bb/F trombones or bass trombones and usually medium to large bore where as pop/jazz players prefer tenor or perhaps even valve trombone with a small bore and bell.
Gold brass or Red brass(there is a difference) for orchestral players and Yellow brass for jazz/contemporary music. There is also cross overs and some bones are made from silver or nickel construction.
Judging by how few trombone players there are out there i'm not expecting many replies to this poll but it would be nice to see some postings.

I play on a Bb/F large bore trombone with a Gold Brass Bell

I play a single valve 30 year old yamaha bass trombone with rose brass bell

definetly G trombone......the sound is amazing

I'm not the trombonist in our family, my daughter is but she plays a Conn 88H Bb/F.