I'm happy with mine, because at the time I've built them it has been the best I could do. We all improve over time, no matter how much that may be.
True enough my first real boat build, to an "expert", would have been deemed good enough for target practice, but I was over the moon with it, because I'd achieved something I didn't think I could do previously. I still have that boat actually!
If I had to pick something I need to improve on, it would be the construction of awkward shapes/corners etc on certain superstructures. My first Type 42 s/structure took about 5 attempts before I was happy with it. My current Portgarth tug build is a challenge, with a few strange angles to get around. Not perfect by any stretch of the imagination, but I'm relatively happy to live with it.
Oh...I'm a drummer too, self taught!