Vb thank you very much for your critique. I always thought that a harsh critique is even more valueable than just critique.

Well for the drinks, I thought that a different perspective to each drink, (i wanted to be much more but I got bored ), would be more playful than a clear orthographic or front view of them. With many drinks i wanted the image to be sth like a library for bars for example, so they could take each one of the cocktails and place them where they want in their catalog. (Sorry for my bad english... Also sorry if my points are newbie-points, but I am a newbie in all this and I want to learn )

For the Fairy your points are really good. I imagine it and it is much better with more bendy hands, and bubbles just around her, so I am going to try it.

As far as if i want to get in IS.. I dont expect to earn a fortune through this, not even make a living some day. But I think that it is a good way to make a nice portfolio, which I could use to my clients too (I work as a graphic artist in very small projects for cafe's, hairdressers etc). Also it is fun!
I really hope some day to have a huge and strong portfolio so I work serious on this, on no-internet businesses.
Thanks again! If i repost my fixed images i really want to hear your critique again

Thank you so much for your responses guys!   
The truth is that cartoon type stuff is the thing that i like working on the most. I didnt use any transparency or gradient, cause in my early works, such things were making the size of my files huge! And some sites require the files to be less than 2mb (e.g. Fotolia)
"The drinks" was a try to produce more commercial images than cartoon type images, or vectorized sketches.
The donkey is going to the trash can you are right.

I am gonna work on the Fairy with some transparency looking methods, and erase the lines, like u said. I gonna make a try on the drinks too (maybe more drinks like a library? or more elements in them so they look more interesting?), and I will post the changes for your opinions.

Thanks Again!