Hmm... let's start:)!
1. The skin, honestly, reminds me of some website; it's quite ordinary, simple, beautiful, and somewhat interesting. It's easy to read and browse.
2. Here, I really didn't like it; I don't think users will enjoy reading long articles and posts (on forums or in "guides") because the bright white color will quickly strain their eyes!
3. I don't know why, but it seems the most appealing to me; it's convenient, "nice," not too bright, easy to read, and looks pleasant.
4. It's a bit unclear; it strongly reminds me of the game itself:), and it will likely become monotonous for players of Heroes 5, as everything is the same, linear, and standard.
Conclusion: After thinking for a long time and immediately rejecting two options (2 and 4), the choice wasn't easy:):):), I chose 3 – it feels right, and it should appeal to a new user visiting the site!