I like the idea of some of them.But I would have to say that none of them are great.I don't have time to list all the problems.
Here is some of my drawings I do in my free time. Please rate:boomer Noice.
4/10You're not horrible, but I wouldn't consider you to be good either.
I like the first one and the guitar. :D
I liked everything.
Very good. You could use some work, but I love them.
The proportions on everything are wrong. The hand, Guitar, Violin, and the cat
Do keep practicing. Ignore negative replies here, I think some of these people don't know what they are talking about.