These are my winners.
This one from Klurskin (Ultra Bright Hyaluronic + Vitamin C Serum) is actually one of my first serums ever. It's perfect for everyday--I use this one in the morning after/on top of my Glossier one, but before my moisturizer. This really lightened my dark marks on my forehead and cheeks.
This Glossier Super Glow serum is super lightweight--has the same texture as water. I use this one in the morning after I cleanse, but before my Klurskin serum. Sometimes I use this at night as well. I noticed it dramatically lightened slight dark circles under my eyes.
I bought this 111 SKIN Celestial Black Diamond contour gel/serum from Space NK and I initially got it because the salesperson said I had frown lines and that this would help, but it also helps even skin tone because of the retinol and other things in it and depuffs my eyes. I keep the applicator in the fridge, so that I can apply it to depuff my eyes. It was super expensive, but it honestly makes my face look and feel like a dream. I use it at night before I put on the Darphin face oil.
This is more of a face oil, but I still consider it a serum. This Darphin Niaouli Aromatic Care oil is sooooo soothing. I put it on at night after the 111 SKIN serum. It feels and smells really good. I noticed it actually cleared up my skin while keeping it moisturized. It has a slight tingling/menthol-ish feeling too, which I love.
Even though black don't crack, I still feel like I needed something more to keep my skin as vibrant as it was in my early 20s (as I approach my 30s). I think my regimen is working. My skin is getting clearer and more even-toned as I age and I think it's with great help of the wonderful skincare products I keep stumbling upon. I encourage everyone to really get in the habit of good skincare--you'll thank yourself 10 years from now.