The thing I like most about Corsair is their quick and timely RMA process and the way their customer support treats their customers because they work to go above what other manufacturers tend to do by such examples of offering pre-paid return shipping labels for a defective product and even upgrading the product to something better when you get a lemon.
That's the type of service that I'm willing to pay a little more to get over other manufacturers that may offer a comparable product for slightly less of a price but thankfully Corsair prices their products very competitively.
I love Corsair's great products and great customer service. I use their power supplies, their coolers, and their ram and I trust it completely. In the event one of their products ever does have an issue, their RMA department is second to none.
I love Corsair's build quality in their products and the fact that they look sleek and professional unlike other manufacturers and their gawdy products.
Quality and customer service! The corsair products I own and have had others purchase on my recommendation are well built and reliable, and a good deal for the price. The fact that we have a corsair rep floating around the forums lets me get detailed answers specific to the product I'm asking about.
I've had to contact Corsair twice in 10+? years for service, and they've always been exceptional - so much so that I still count both experiences as some of the best I've had with any manufacturer.
I've come to like Corsair's attention to quality in their products, not to mention the variety of products they produce. I have yet to deal with they're customer support, but that's because they're products haven't given me any problems!
What I like about Corsair is that any time I have an issue they stand by their product 100%. I've never had a bad RMA experience with them for the couple of times I ever needed support and they've gone above and beyond. Their products rarely ever fail to begin with! And their cases are so sexy...
I like corsair because when I sell it to my customers odds are the wont be back complaining about BSOD's. I love the hxx series also, very easy to install and great performance