My posters and ideas

I'm sorry that my posters are a little bad quality, but I'm still a student, and I don't have the money for things like Photoshop and illustrator yet.
I'm 18 and I study graphic design, but let's be honest, the kind of graphics that are most popular right now are the black and white, sharp, and straight to the point design which really give out a serious and a negative feeling, and well... I'm not really into this kind of stuff, I prefer things to be bright, smooth and colourful. (I'm an optimistic person).