I would also suggest that each carry, having different strengths and weaknesses from the others, might need a unique starting item set based on both their characters needs, and the ability of the players.
IE: My build on caitlyn is based off of caitlyn herself, as well as my playstyle with her...
<3 starting boots. early speed = better skillshot avoidance, and when you're early game that's key IMO.
If I have a good game i'll swap my boots out for a phantom dancer later anyway.
Ah, A question even a newbie such as myself can take a shot at. Being as my character of choice is Caitlyn, and I tend to 1 v 1 in mid, I don't go AD starting item. I do use ArPen runes for an added early game boost however.
I grab boots + 2-3 health potions. I find that for me, this is the most...