While everyone is going to have a different idea as to which one to get - I'll add my opinion on why I chose the iPad Air (which I'm now using and adore!).
My main reason for getting the Air is that I don't carry a purse and very rarely take the iPad out of the house. So, I didn't need the portability of the Mini. I have an iPhone 5 for a "pocket computer" and that goes with me everywhere. So I felt I didn't need another portable gadget. Though I must admit - this iPad Air is VERY light and quite thinner than the previous versions...
So, in a nutshell, I feel the question you want to answer - how portable do you want the iPad to be? If it really never leaves the house, as mine, then get the Air. If you always want it with you - get the Mini.
Or, satisfy all situations and get both.
Marilyn
My main reason for getting the Air is that I don't carry a purse and very rarely take the iPad out of the house. So, I didn't need the portability of the Mini. I have an iPhone 5 for a "pocket computer" and that goes with me everywhere. So I felt I didn't need another portable gadget. Though I must admit - this iPad Air is VERY light and quite thinner than the previous versions...

So, in a nutshell, I feel the question you want to answer - how portable do you want the iPad to be? If it really never leaves the house, as mine, then get the Air. If you always want it with you - get the Mini.
Or, satisfy all situations and get both.

Marilyn