The best idea is to choose a color you like. You have to have the passion for it first. I have multiple colors and I play around some, but my favorite is black, second is white, third is blues (even though the judges don't like them)... and I do like a really dark cuckoo although this is another variety disliked by judges.
I also have to admit that I like showgirls. Any chicken that looks like it walked right out of a Dr. Seuss book is fine with me... however, I breed them sparingly as I **love** showing and they aren't accepted. I still show them, but they won't go higher than BV.
Choose a color you like. If you want a beginner color, try to stick to a solid color that you like,.. although if there is a patterned bird that you just feel oh-so passionate about then try it.