Those logos are a good start! The Mickey one is my favourite out of the bunch because it looks the most crisp and has a clear distinction between title and subtitle. I think it could benefit from being layed out in either of these ways though, to balance it out a bit and make it more widescreen-oriented:
[rimg]
https://i.imgur.com/zZjxwFJ.png[/rimg]
The characters, I think, are a bit superfluous, but I think a bigger problem than having them is the fact that you forgot to remove the white space between their legs. It would also not have hurt to give Mickey some shading so that his head doesn't get absorbed by the S.
The Super Mario 32 and World at War logos are pretty balanced, but I'm really not a fan of the bloom that's present in all of these .I think all it does is decrease the overall fidelity of the piece, especially when you start looking at the edges of letters. I think the trend of repeating the same color pattern for letters within the 2 Mario logos is pretty lazy and makes the overall logo less interesting. In the case of the World at War logo I think that the subtitle deserves its own colour and perhaps its own font as well considering the tone of the message. In the case of the Super Mario 32 logo it feels like all the colours were just randomly chosen, which I think is pretty weak.
I think the last logo is a bit of a typographical mess. Aside from being unbalanced it lacks punctuation, has inconsistent shadows and very poor colour choices. The colours of "and the friends" make these "friends" seem oddly sinister, which stands in complete contrast to the tone given by the font used.
My tips for you:
-stop using bloom and excessive blur. It reduces your logos' quality
-think about the message behind the logo. Font and layout in logos emit a certain feeling to the reader. The Mario font generally is pretty playful so it gives a lighthearted tone, while a more rigid font can be used for more serious tones
-think about the balance of a logo and where the viewer's eyes are drawn. In the case of the World at War logo, the focus very much lies on "Super Mario", rather than the part of the logo that I'd consider the important one. In the case of the Mickey logo, the reader's eyes have to move to a new line after every word, which feels a bit weird. And there's a gear throwing the balance off.
-In the context of cover art (the backgrounds on 3 of these)... again try to think of the message behind the elements. Super Mario 32's cover does a good job of evoking the feeling of a straight downgrade to SM64, while the cover of World at War, again, evokes absolutely no feeling of war.