Hmm freaksavior.. what else... oh yeah. With your SATA cables connecting to the HDD, need cleaning up, the power cables are just dangling there, make an effort into making them "arched" instead of just leaving them there, dangling looking rather messy. Try sliding the excess cabling behind the hdd tray, or mobo tray...
Whats the point of a cathode there? I'd instead run it down the mobo tray or the side panel... as if that cathode will light the case up with the tooless brackets and the 5'25 bay in the way..
If you follow my instructions, also move the inverter somewhere else; thats out of our view or more convenient/neater for wiring.
I'd also consider making a hole for the CPU 8 pin power.
The burner, SATA wire make it go STRAIGHT into the gap and not curve around the place when going in, its even better if you route it down, behind the HDD cage then go behind the mobo tray gap. The loose fan wires could be twisted to reduce length (not by much) and will look better. Do the same with the cathode wires but DONT overdo it as the cathode's wiring is fairly fragile. I'd invest in multi fan connector block with the number of fans you have... its purely for aesthetics remember.
Apart from that , your PC practically is 100% fine. Just remember what I told you to do is bordering on OCD, see i spend like minutes adjusting wires, lol. Very subtle changes can mean BIG things...
On a side note I think I should make a "Your wiring has slack in it" logo or something