I'm for sure leaving it long. He's a new horse to me and is shedding out into the coolest dark shade of sooty palomino - what a neat surprise! His flaxen mane looks so eye-catching with the coat colour!
I have a pmu mare with a beautiful mane. A girl wanted to show her in some local english shows this year, and I couldn't cut it. We tried a running braid, but the mane was so heavy and the first show she went to was so windy that it wasn't working, so they let it down. We got nothing but compliments and ribbons! Its pretty funny seeing the little draft x pony cleaning up in all of the pleasure classes. Those long legged hunters don't stand a chance. Leave it long, I will be thrilled if the long manes come back into style!
This is Jasmine on a "bad hair day". I'll have to get a pic of what it looks like when its actually nice.