I own a multimedia entertainment website, Critique me!
Here is my site link: www.havocarcade.com

The main problem here is it feels too busy. This is caused by a few things.
First, the background is incredibly busy. I almost want to look at it more then the sites content.
Secondly, the content has no breathing room, everything seems crammed together. Give the elements some space.
Third, navigation looks a mess. Organize things into their basics, focus them into a few options in your navigation, 10 or less.
Lastly, the header image looks like it wasn't edited properly, it's squished. Find an image that fits, or edit this one to work within the space you have. Don't cut corners and squish it.