Ha! What a joke. It wouldn't accept just my name and email, but requires me to link via facebook or twitter to verify that I am a "REAL" person. Facebook + Twitter = Evil, and I don't have either accounts, and I will forever stay rooted in the 20th century.
What is more important depends on how much of that you already have. Reliability is very important when competition fails every year, but every 10 million years on average? Other things become more important. Space is very important if you have only 128GB and even your bare Windows barely fits. 2TB is OK for most users without large video collections though. Read latencies and speeds are important (in single-user scenarios) when you have to wait more than 0.1s for all of them combined to finish real life operations. Write latencies are not important at all as writes are all cashed and asynchronous on modern OSes (a user does not wait for them to finish to do anything else). But very important on database servers with ACID.
The most important feature kind of depends on it's application. If I'm looking for an SSD for my gaming build, I really only care about speed. If it's for a family member's web browser, price is most important. If it's business related, it's all about that reliability. It's kind of hard to put a blanket response on the most important feature.