I personally prefer a matte finish. My T-zone can get really oily at times so I feel like it's better to be maintain a matte look. Here I used MAC Prowear in NW45 with a combo of Per-Fekt Beauty Decadent skin perfector. I combat oil with Kett Sett - No-Color Setting Powder & MAC Blot Film!
One of these days I plan on going "Dewy" ...maybe summer.
I think if I spray some Fix+ or Charge water on my face, it should do the trick.
Do you prefer a Matte or Dewy foundation finish? What foundation do you use?