Where oh where do I start?!?
Eye make up is my biggie so here is my list of brushes I use regularly...
252 - good for applying all over colour, lash line to brow kinda thing
239 - good for applying general lid colour
272 - good for applying lid/crease colour
219 - good for smudgy lining
224 - good for blending
217 - good for applying colour, applying prep&prime eye for a base
242 - good for applying colour and lining with shadow
228 - good for packing in small areas of colour
263 - my perfect fluidline brush
Big list?
I think so!
The ones I'd recommend starting with depend on the kinda thing you're doing. If you'll do a lot of fluidline like I do (every day!), I'd definitely get a 263. Then the ones I started with are the 239, 224, 217, 228, & 242. Ok, thats a lot but I really can't make my mind up!!!!
Most people go with a 239 and a 224/217, you can really do a lot with those ones!!!
Hope I've helped a bit and not confused you too much!