None, but not because I don't like music. In fact I usually have a song stuck in my head the entire time I am fishing.
I don't use earbuds because I want my ears available to hear everything else that is going on, from fishing revealing themselves to someone trying to get my attention for assistance. With even 1 earbud in, you are making yourself deaf to other sound from that direction.
I don't play music through speakers, even at a low level, because the vibration goes to the water, alerting the fish of your presence. Doesn't matter if it is built-in speakers in your boat or a small radio sitting on the deck, that creates additional vibrations.
I don't care if other people listen to music, but I do expect folks to show common courtesy. I am not trying to enforce my silence on you, please don't force me to listen to your music or meaningless conversation.
Worst example I witnessed of this was on Lake Mead a few years back. It was minutes after sunrise, the lake was like glass & I was on the main lake off a point fishing striper boils. I hear some music and it takes me about 30 seconds to figure out it is coming from a yellow boat that I can barely see, I'm guessing it was 2 miles away. It was some people skiing and as they get closer, the volume of the music they were playing was ridiculous. When they were about 200 yards away from me, it sounded like I was at a concert. At that distance, I could see they had some kind of "rollbar" across the top of the ski boat & there were 4 huge speakers mounted to it. Luckily, the person they were pulling was a good skier and didn't fall, so in a matter of minutes they were far enough uplake that I couldn't hear them anymore. I just wonder how many folks were asleep in their houseboats as Music Boat cruised by, waking them up and making them wonder what was disturbing the peace in this National Park.