1) What is the most important feature in a CPU cooler?
The performance of the cooler and/or in comparison to noise levels.
2) What do you like most about the Vantage ALC [as seen in the video]?
How easy it is to install and use. Not only that the "bling" effect also gives it an interesting look in comparison to other coolers.
3) What resources do you typically use to research CPU coolers when trying to make a decision on which one to buy [i.e. this website, magazines, friends and family, manufacturers website, etc.]
I use everything available on the internet. Various websites/blogs, forums such as XS, friends who have used it and CPU magazine.