What program are you trying to get into + what does that school/group/etc usually focus on? If you're building a portfolio to get into a school you should have
A) An artist statement of some sort (Unless you're purely commercial, in which case i have no idea, sorry, Fine Arts major here
B) Work that follows suit in your statement above AND reflects on you as an individual. Prove your passion and show your thought processes!
C) Show some 'sketch work' too - it's a really good idea to show how you come to your work. If you just kinda fuck around with photoshop/illustrator until something looks nice - you've got some work to do.
D) I don't see any kind of theme in your work - it's very all over the place and there's nothing tying it together.
E) Many places will just glance at a photo/slide/etc for about 2-3 seconds then move to the next one (unless you have a personal interview). Make sure you pick photos that REALLY stand out and are GOOD QUALITY.
and a bunch of other stuff but i cba right now