There is nothing I love better than a minimalist open front blazer.
It looks casual but yet professional and chic, and you can wear it over ANYTHING even just jeans and a t-shirt, and it amps up all your looks.
I also have a soft spot for thin and soft lapels because it softens my inverted triangle (read: linebacker) shoulders and makes me look less boxy up top when I want to wear skinny jeans..
I like all the colours possible and all the lengths (except cropped ones, they make my shoulders look bigger). I especially like ivories, whites and creams, but I even own a blazer in black, and other colours like cobalt blue and dark brown.
The best colours are neutral ones, but I love me a good graphic print as well.