Blah blah blah. If you like it and it makes you happy, and you enjoy the amount of maintenance required, then mission accomplished. The tank looks good (better than most of the pictures people post in "your tanks"). Can it be better, sure. Even the best can always be done better, if you have unlimited time, money, and patience. Take out the center piece with the moss on the top and that's the only change I would suggest other than redoing the tank 3x/day compulsively (which I have done and no one thinks any of them look bad except for people who don't understand this is a hobby meant for enjoyment) until every reply here says the tank is perfect (impossible lol). Any girl/guy you have over will love the tank and you will get what you were looking for
. Takashi Amano was an award winning photographer long before he was an aquascaper. If he were an ordinary citizen as our Freud, golden ratio and triangles wouldn't be all the rage, biotopes and difficulty of the tank (like a planted cichlid tank with mostly soft stems etc). Just as museums have a lot of art that most would agree is important for the period but looks retarded, your only question on how a tank looks should be to yourself. If you have a lot of time and don't mind tinkering and extra maintenance (mind you tinkering makes certain plants melt repeatedly), then know you can always improve. If you have a larger budget or work hard, then going with a larger tank progressively usually follows. Low tech with stunning visual color variations is personally more impressive than most of what high tech churns out however either affording or finding certain rare plants/mosses/wood/rocks throws that theory out the window. The further along you get, the more you will either bang your head against the wall or simply look at the tank and fall into that amazing trance we are all so addicted to, realizing nothing complicated is necessary. Looking one more time you could contour your substrate more effectively but since you picked a perfect size and color you tank still looks great, I wish one of my first few looked as good.