HOLT:(1) HOW MANY to buy,
depends if you want to wash them everyday, if you also want ds2 to use them and if you are going to go strickly CD or if you are also going to use disposables. i have 5 BG 3.0, 2 crappy ones i bought off ebay, 1 bamboo motherease, 1 no brand hand me down, and 1 i made myself

But Bum Genius are by far my favorite. They are easy to use and they do not leak. 
I'm probably going to buy more but i also want to try Fuzzi bunz because i have heard good things about them. I also want to get 1 blueberry just because they are too darn cute. so i'm going to hold off buying more until i try those ones just in case i like them better. i also want to make more of my own.
HOLT:(2) what colors do you prefer,
i have 3 pink, 1 yellow and 1 green. i love the pink and green.
HOLT:3) did you get any extra liners or other "accessories,"
No extra liners are needed. They come with 2 liners. A newborn and a regular. I still use the newborn liner with dd because she is not a huge wetter and they are less bulky. And i use the regular liner with ds3 because he is a huge wetter and he is bigger. So far no leak with either.
HOLT:(4) do you use them at night,
I have not use them yet... just because i still have a case of disposable for each of them. But once i run out i do plan on using them at night
HOLT:(5) do you use the disposable liners to help with the poop,
i haven't yet. But i do plan to go out this weekend and buy some at Wal-Mart. because i realy hate dealing with poop
HOLT:(6) do you wash them by themselves or with other stuff?
Okay i'm a bit of a freak and wash them all by themselves. I don't want the poop or pee on my other clothes and stuff. i know it sounds stupid

because after all it is in the laundry.I guess it's the germophob in me. And I wash them every night.
I like that i am saving money on buying disposables and i like that less is going in the landfil. I do not regret buying. But i do hate dealing with the poop. So i am going to buy the liners. When the poop is firm it is easy but when it is runny and messy
. Which is why i have decided to buy liners. Also wanted to say that it fits dd and ds3 beautifully. dd is 16lbs and ds3 is 35lbs