- how old you are
- how much coverage or how "see through" you want it to be
- degree of dewyness - or sheen that you want.
- does it have an spf
- how much money do you want to spend
ShuUemura Face architect - good even coverage with a slight sheen - kinder to older skin, lots of good colours
Giorgio Armani Fluid Sheer - very dewy sheer foundation great for a younger glowy skin
Maybelline Instant Age Rewind - good coverage, good texture, good price, good spf
MAC Select Moistureblend - medium coverage, light spf, good colours.
Remember when trying to find the right colour foundation for you try it on or around the collarbone - and absolutely have a good look at it in daylight, not just in the stores. This way you will look the same colour from your chest up and eliminate the telltale mask line around your face. I also usually advise to buy 2 foundations - one which is the lightest you will be in winter and a second one which is the darkest you will be in summer. That way you can mix the 2 colours in order to get the right colour for yourself throughout the year.