TGP and LL Categories

[PhatCat]

Well my question is a simple one its mainly for the major tgp and link list owners but any input will be accepted. I was thinking about starting my own tgp and later on a LL and I was wondering how many categories are needed to start a simple tgp and ll. I ask this because most of the major players have lots of categories but I was wondering if they started that way or added on as they went because as of now I would think it would be hard to fill up 40 or more categories to start with. So if you could provide any help at all that would be much appreciated.