Constructive criticism:
That, to me, looks like you printed a logo out from your computer, put it in water and then put it on the radiator. It looks quite bad.
Try glossed effects, glass, or even just changing the dimensions of the logos, so that they are slanted or are going into the distance.
Go onto Google and look at logos or things that have a particular style to them, or something that has not been done before. The ones in the OP and this are not very attractive, and need quite a lot of work.
Also, try bringing out the best things in a logo, i.e. the shading, tone, colour.
Make it stand out most of all.
EDIT-
I myself have never made/attempted at making logos, but I am just trying to point out things that I have seen from previous logos that may help.