Gift for my partner

This was a gift for my husbands birthday. It took me a long time and I learned a ton - so much so I can already see how much is wrong!!
Personally I think I'm still having trouble translating from line art to an end render, seems I lose some of the things I liked about the line art along the way.
I feel I can make my next piece much better though, as I can see what's making this picture flat and just not as good as it could have been. At the end of the day I'm still proud of it - it took me a long time and I made a lot of progress.

That being said if you have any critique I'm more than welcome to it!