l-r: YSL Le Teint Touche Éclat in B40, Giorgio Armani Luminous Silk Foundation in 4.5, Chanel Vitalumière Aqua in B20, Dior Nude BB Creme in 002, Koh Gen Do Aqua Foundation in 013
l-r: Chanel Vitalumière Aqua in B20, Koh Gen Do Aqua Foundation in 013, Giorgio Armani Luminous Silk Foundation in 4.5, YSL Le Teint Touche Éclat in B40, Dior Nude BB Creme in 002
My favourite of the bunch is YSL Le Teint Touche Éclat in B40 (reviewed here and featured in my 2015 favourites). This is probably in my top 3 of all foundations I've used, second only to NARS Sheer Glow. It's so instantly beautifying, melts into the skin without texture or application issues, diffuses imperfections and unevenness, gives you that airbrushed, dewy (but not oily), soft focus glow, has fairly good coverage while not masking the skin, and is particularly kind on dry skin. If I want my best chance at a good skin day, especially if I'll be photographed, I'll reach for this or Sheer Glow.
My second favourite would have to be Chanel Vitalumière Aqua in B20 (reviewed here and featured in my 2014 favourites). It's such an excellent everyday foundation, especially when your skin is in decent shape. What I love most about it is that it's probably the most transfer-proof foundation I have, possibly because it's water-based, so it really adheres to the skin and isn't easily wiped off. The finish is more on the satin side than the YSL, and coverage is light to medium, but it looks so natural and undetectable while enlivening and perfecting the skin.
Next we have Koh Gen Do Aqua Foundation in 013 (review here) and Giorgio Armani Luminous Silk Foundation in 4.5 (review here). I find these two pretty similar, with the main differences being coverage and finish. The Armani is a bit higher coverage and has a more semi-matte finish than the Koh Gen Do, which is more liquid in consistency and has a fresher, dewier, more translucent finish. Other than that, I find the two interchangeable. Both have coverage on the light side, so I tend to use 1.5 pumps rather than my usual 1. They're solid everyday foundations that feel lightweight, look natural on the skin, hold up decently and don't get too oily throughout the day, and generally perform well so long as the skin is cooperating (i.e. not going through a dry or blemish-ridden patch). As the Armani sets more matte than the Koh Gen Do, I like the effect of spritzing a hydrating mist all over to make it less dull and flat, and minimise any cakiness from powders I've placed over my foundation.
Finally, there's Dior Nude BB Creme in 002. As I mentioned in my current makeup menu, I'm not the hugest fan of this one but I'm forcing myself to use it so it's not completely neglected. I don't know what it is about the Dior, but the slightly thicker, mousse-like texture doesn't entirely agree with my skin. It's probably targeted more for oily/combination skin than dry or dry/combo. It feels a bit tackier and heavier when applied, and doesn't give my preferred glowy finish. This one is a lot more satin, bordering on matte. It can highlight dry patches and doesn't apply as evenly as my other bases. I find fingers work the best, applying a small amount of product into the skin in sections, but usually I use a brush since it's quicker. I try to make it more serum-like and easier to blend by mixing a drop of face oil into one pump, then finishing with Smashbox Photo Finish Primer Water or MAC Fix+ to give my complexion more life, dewiness and moisture.
Colour-wise, I would say I'm between NC 20 and NC 25 (probably closer to NC 25). Of the 5, the Chanel is the best colour match for me, with its beige/yellow tones. The Koh Gen Do is a touch too light, especially in the summer, and much too pink. The Armani also leans pink (or peach-toned), and is slightly dark when compared with my neck (I learned this the hard way when inspecting my face in natural daylight while waiting for the train). The YSL is also a bit darker than my natural skin colour and the colour's not perfect either, but at least not too pink (it's more golden brown/orangey, when I need yellow or neutral/beige). The Dior is yet again, pink-toned with a warm brown tint, though it does have enough yellow in it to make it work. So long as we're not scrutinising too closely, all of them match me well enough (with the exception of the Koh Gen Do, which I should have bought in 213) and most are probably my closest matches with the shades available.