What kind of skin do you have- oily, normal, or dry? Do you like heavier coverage, or lighter?
I have oily skin and like med/heavy coverage, and I use Intensive formula. The Origional Glo is a lighter coverage formula, and gives some "glowiness" to your face. Semi matte is good for normal skin, and it gives medium coverage. Matte and Intensive give the most coverage and are good at absorbing oiliness.
I have light to med skin with a lot of ruddiness, and I like Fair Medium or Cool Medium. For your skin color, some good colors to try might be Cool Fair, Cool Fair Medium, Cool Multitasking Neutral, Buff Fair Neutral, or Buff Fairly Light Neutral.
Weekend Getaway , EMail Me, and Apple are all good "no sparkle" blushes. The first two are pretty neutral, peachy shades, and Apple is a natural pink. I also love Waffle Cone- it is a pretty light earthy brown/pink. It does have some shimmer, but I can wear it at 41 and don't feel it is too shiny.
Have fun experimenting!!