well, as long as you do your best and learn thats what counts. I made a poor choice with my first pastel, didnt know what to really look for. But in general, all pastels brown out to an extent when they get older- they lookm best when young. But a nice pastel will stand out as an adult from a browner one.
If you want a suggestion from me since you are working with pastels, pick a lighter color mate for them ( if you are choosing between a non pastel mate) A normal bp with a lighter color, and/or a more golden color will most likely give off much lighter pastels. I have some females that are just plain too dark for me to even consider pairing to a pastel. My uglier pastel will most likely only be breed with another pastel at the least- a super pastel wol dbe best to try to bring out a nicer color.
Another thing to think about with pstels is high contrast verses blushing. I prefer high blushing, and so i think of blushing aspects for the pastels and their pairs as well. I dont have awide selection of snakes, so i paired with a lighter female for my pastel this season- i wol dlove a light color gold bp with a lot of blushing for a mate for a pastel!!
Another aspect to consider is the darker snakes- they wold most likely go better for black pastels, cinnies, and mojos if you want to go for darker mojo's.
* bare in mind, this is my veiw on it. I actualyl would also liek to go for light colored cinnies- so pairing with a light snak emay end in nice results. Some of it is simply what yo want to go for, but if you look at th enormals you have, try to pick out the ones that will enhance the said morph's traits. Or what you want to try to go for ( example being the lighter cinnies- i think lighter cinnies wouldmake nicer pewters...)
Also, i have heard of people getting awesome babies from not so good examples of parent morph. Nothing is a guarentee, but I fele with more of a selecting breeding approach, you have a much better shot at having influence over the babies that are produced.
The speil with reduced patterns from what I understand it, the genetic reduced patterns that are proven can be either dominantor co dom ( i forget which one) or recessive. Some are just for looks and arent genetic at all. However, if you want reduced pattern babies in your breedign plans, you'd have a better shot if using reduced pattern parents than busy pattern ones ( but once again, not set in stone. I know of an online pal who loves reduced patterns, and she got a lot of busy pattern babies!)
And abot pastels.... one of my most exciting breeding projects is simplky the pastel project. I am going for supers ( in a few years)- high blushing supers. I also want to make the really nice pastels. Yeah, they may be one of the cheapest morph out there, but I want to bring back the pretty pastels. Pastels are the one morph I am always looking for believe it or not.

talk about going off topic tho- and writing another novel....lol. sometimes i get rambling!