User Friendliness Bible: Has it been published yet?

[TylerAbernethy]

I started with that intriguing title because that's all i've got.

What I mean is, I don't know the exact topics that I am looking for.

Anyways, here's the shindig.

I was just replying to a nice new member to SEOmoz, and he asked if he should set up his 3 sites in 3 separate campaigns.

I was telling him about the different  number of keywords that comes with each respectable price, so I had to log out to be sure.

Low and behold, not only did SEOmoz not kick me to a "You have been logged out" page (basically, it allowed me to continue, un-interrupted, and finish my thoughts), but it also did something MUCHHH better.

LOL i'ma little giddy about it even.

So, I typed a fun little response, added my links, and whatnot, and FORGOT that I had logged out to check the prices.

Well, when I logged back in and clicked reply again, all of my text showed up in the editor (as a draft).

I am wondering, what is the action of trying to think of cool ways to improve your site called?

User Friendliness Optimization?

User Engagement Optimization?

User's Enjoyment of Using Your Site Optimization?

----insert metaphorically cloudy line here--------

Conversion Rate Optimization?

At some point it does overlap with Conversion Rate Optimization, but either way, does anybody know of any cool tips to make people "enjoy" their time on your site more?