FTM: Baby bottles.

Shun
I'm a first time mommy. 
1. Are you guys going to be using glass or plastic bottles? I have both but my mind set is to using only glass bottles. 
2.What brand of bottles do you guys prefer and to why?
3.How many small and large bottles are you supposed to have?
4.Any thoughts on bottle warmer?
5.Extra nipples. I don't really understand the fast flow and medium flow and all these different kinds of bottle nipples.