Mozart melts my heart. His music represents exactly how my brain works. It’s complicated and there are changes in the tempo that seem random, but it’s really just telling a very intricate and varied story about life. Okay, I got a little carried away there, but I get bored of the other two. Beethoven’s my second favorite because I get bored after a longer period of time, but my least favorite is Bach. I can’t handle the repetition. It just feels safe to me and I need excitement, or at least my brain does. Simulation is probably more accurate, but they all have some good songs, but Mozart gets me.
I wouldn't call Bach repetitious. He touched on a lot of instruments and styles and did a lot of different things with them. Although he is very baroque which might explain how one could view his stuff as less dynamic than others. But anyway he's known for his fugues which involves up to five independent musical lines interlocking on a single musical theme and no other composer has gotten close to him on that style. It's very complex but I'd understand why some don't like him, because the complexity can make it very rich and not suited for casual listening.