Personally, it's not my style; I tend to go for a more natural look, rather than shop bought shipwrecks and novelty things. However, I appreciate that you've got live plants in there, it's awesome to have a good variety and it's so satisfying to see them growing and getting tall and healthy!
If it were my tank, I'd tend to choose a theme; in your case, maybe pirates. Designing a tank around a theme, although it sounds completely over the top, can actually turn out quite cool. I've seen a picture somewhere where the tank was decorated like a candy land, with the backdrop pictures as jellybeans, ridiculously outrageous decorations, complete with a fake chocolate waterfall. It wasn't something I'd do myself, but it looked so awesome, so maybe you'd be interested in doing something similar with a different theme? It could become a pretty awesome art piece.