What do you prefer?

This week I have been looking at some new upcoming fabric lines and I am trying to work out what to order. Which is very hard as there is so many beautiful ranges available. Then once I select the ranges I really want, the next question I ask myself is how many bolts of fabric? Followed by do I want to order some co- ordinating pre cuts? Now I have ordered a few precuts previously but I just don't know which ones and it is too hard to stock some of each co -ordinating pre cuts.
So this is my question to everyone. Which pre-cut do you prefer when you buy pre cuts?
Charm square packs (5" squares), layer cakes (10" squares), jelly rolls (2.5" strips) etc.
                                           Until Next Time
                                           Keep Stitching
                                           Cynthia