I wish when the store window was up you could buy consumables with F1 through F7 and after the store window goes down it would revert to normal.

For example,
F1 - Buy Health Pot
F2 - Buy Mana Pot
F3 - Buy Ward
F4 - Buy Pink Ward
F5 - Buy Oracles
F6 - Buy AD Pot
F7 - Buy AP Pot


Mainly I want F1 through F4 and mainly for the early game, so like you could buy your first item and spam F1 for some champs.

I like it, although I fear that few people would discover the feature on their own, but combined with a bit of UI magic, this would be awesome.

One thing I really support is having quick-buy options for your starting kit and consumables. I currently use a customizing program to achieve part of this (i.e. a group with all the consumables that sits right at the top and every other class of item I'm likely to build below that).