Corsair is awesome because they make high quality products, with great designs and integrated features. They also stand behind their products and work hard to make things right for the customer. If all companies worked this hard, the world would work just a bit more smoothly!
I really love the packaging of Corsair products, their awesome warranties, the excellent customer service, and the reliability of their products. I also like how Corsair places a lot of emphasis on detail and their awesome corsair support forum.
I love Corsair because I've seen a handful of other PSUs fry out/explode on me, but never my Corsair PSU. In addition, I have some DDR (the kind before all the numbers, yeah) from Corsair that always kept pace when I overclocked the systems it went through (other components got a little toasted ) and is still hanging out in a basic system today.
I suppose for the TL;DR version: component quality and longevity.
What I like about Corsair...
Memory is top notch,
Awesome cases (built numerous systems for friends and family),
Power supplies have lasted forever,
Customer service (including rebate services) are unmatched.
I would hate to see what I've spent at Newegg.com on Corsair products alone in the past 7 years alone. Great Stuff!
I have been building PC's since 1993-ish, and for the longest while I had hoped to have some sweet Corsair ram in my systems, but Corsair was always just out of my budget range. Unfortunately, I grew tired of system instability and crashes when trying to use my puter for recording audio, so I switched to Apple products. Well, after a few years, I could not resist the urge to build a new gaming PC, and now that I had the money, I went with Corsair ram, Corsair CPU cooling and a Corsair PSU. I have not looked back since! If I would have had Corsair in my system years ago, then I likely would have never purchased a mac.
Corsair, your stable, agile and beautiful products make me a better person.
I like Corsair because of their involvement with the enthusiast community, excellent quality of products, and unmatched customer service. It also doesn't hurt that their entire product line looks just as well as it performs.
Quality. That is what I think when I hear the name. My brother used Corsair memory that was fast and had 0 issues. I have a Corsair h50 closed loop water cooler that works like a dream. I've thought about buying the new Corsair headset when my current one dies.