'what to look for' question

So I'm looking into getting a new bp with the deposit money i plan to get back soon. I'm planning to get either a vanilla, fire, black pastel, or multiple if the price is right. I know what I want to look for in a black pastel, but i have no idea how to tell what makes a vanilla or fire 'good'. what are some things to look for in either of these (as a baby)? and do either of them lighten up over time?

thanks for any opinions and help.

Vanillas and fires both tend to get lighter with age. Basically look for the brightest ones you can find. They both tend to have obvious head spots, and my personal tastes run towards reduced/banded patterns.