Yeah I really like it too but quite a few people have suggested changing it, I can't really see what the problem with it is, it's aesthetically pleasing and does the job 🙂
No problem for me like the strange space or virus threat. I'm using free Avira.
I think your blog theme is okay. Maybe just make a more appealing banner, a bigger one with more color and slogan or at least text explaining what the site is actually about. The forum theme needs more tweak, especially in terms of icons, IMO.
I like the basics of what you have. I think you can work on it and make it look a lot better. No need to get a brand new one though.
Some examples: where you have your header-bg.png as a repeated image, replace that with an image that is related to gaming. Like a Mario stage, but have the opacity turned down so that it's not distracting, but still visible.
Same with the plain one-off grayish color that you have on either side of the website. That can be turned into something more gaming related and really spice up the website.
Your forum could use some spicing up as well. Your on/off/offlock images can be changed to something like your LevelUnlocked logo. And again, the plain color on either side can be made into a nice stylized image.
Also, you should keep your favicon the same across both your website and your forum for consistency.
*Note: I'm not getting the virus detection anymore that I posted in your other topic. Using premium avast!