My favorite liquid foundation for right now is the Studio Fix Fluid in NC30. It's hard for me to find the right words to describe how awesome it is. I used to loathe liquid foundation because it always felt really heavy, but when I found Studio Fix Fluid, I changed my mind right away.
It is the opposite of what I expected out of a liquid foundation: it's light, it's got really good full coverage, it's a great base for your blush and bronzer, and it has really great staying power. It gives such awesome coverage that I don't really need to worry about any red areas on my face, and trust me, my cheeks are always red.
It creates such a nice, clean canvas on which you can really bring into focus the makeup you want to have accentuated. Blemishes, scars, and other discolorations are all covered up really well by this foundation. In fact, I don't really have to worry so much about concealer, except the dark circles under my eyes.
And sweat? It stays on even if you have been sweating all day. During the summer, I was a sweat monster, and this foundation stayed put until the end of the day! It also does the same thing with oil. It absorbs and disperses oil, so it's perfect for my oily skin.
On a side note, I have heard of people getting breakouts from this liquid foundation, but I have not had that experience. However, if this is the case for you, then I would highly suggest switching from Studio Fix Fluid to any of the liquid foundations that are offered by Clinique. Clinique is known for its sensitivity to people with allergies. They allergy test everything over and over, and all of their products are fragrance-free.
Personally, I have only tried Clinique's Superfit Makeup, and I have to say it just doesn't offer the same amount of coverage that Studio Fix Fluid does. Gosh, I can't tell you how much I love Studio Fix Fluid. It's just sooo magical. I don't think there's a better foundation out there. If you are interested, it is available at www.MacCosmetics.com for $26.00. There is also a pump offered for $5.00, but I haven't really had to use it for some reason.
If you haven't already, I hope you switch over to Studio Fix Fluid!