I too like the rocks.
But the tallest one should not have the very tip cut off. I don't know if you want or can push it down but it will certainly look better if it is not going out of the "frame".
Since it's obvious that the beauty of the hardscape is in its heaviness it would make sense to plant the tank in such a way that this feeling is enhanced. Also as it is the tank already looks larger than it is. One way to keep these 2 impressions going on is to use small frilly plants mainly in the lower parts of the rocks and keep a lot of the rock surface visible.
This picture leaves you with the impression of a very heavy rock mass:
This picture also gives an idea of the use of small plants/big rock:
And of course - the fish should be small. By the way one VERY cool way to stock such a tank full of rocks is to use a bunch of gobies. They will constantly play and move in, out, and around the rocks seldom wandering to the glass. The whole thing will look like it is full of life centered around the rocks.