MAC's Studio Fix Fluid has been a foundation I have used for the longest time. Although I don't use it every day, it is a staple in my collection and always have one floating around. I like the coverage and the finish it leaves on my skin. It is a very popular foundation and I can definitely see why. It is a medium to full coverage foundation with a semi-matte finish and I wear NC25 at the moment. My colour varies depending on the time of the year. You could also try MAC's Pro Longwear or Matchmaster foundations.