Adam
I second Jocks piece above. In really short landings in the Citation you can use the AOA. Other times you just fly it on and sometimes with the Citation which has straight wings I will flare on longer runways to try and get that allusive chairmans landing as we call it
BUT the greaser has little to do with the flare as such and all to do with the rate of descent on contact.
These landing methods are relevant to light GA aircraft but starting out you use the basic principle as outlined as you are likely to be landing on low wind days.
Pace