Ok so let me give you my personal feedback..
The site functionality seems to be great , i like your level of customization , very good work on that indeed.
Great site , i like , but since you already know that

, lets get to the good stuff.
Here is what I see and it ticks me just a little , there is too much spacing between elements , maybe thats your intention , but it a lot of wasted space in my opinion ( example , the nav bar from the main wrapper etc.. , forums and such ..)
Now i think you are trying to create a really happy theme , which is great , however! , thats the dilemma here , i think its VERY bright , my eyes find it very irritating , i cant stay focused on one particular part , i need to "run" for darkness lol.
Some Elements need to change color , for example the nav text , hard to see right off the bat , you have to "look" for it... I really think you have a great site , but just those particular things that , at least for me , keep it from being a very good site...
But that's just me

.
Good work! nonetheless