Being primarily a designer/front-end dev I needed CMS that would suit my needs, by that I mean ease of use without much PHP, templating engines, layout restrictions, etc.
Then I found about CouchCMS, it allowed me to retrofit my existing template into Couch within minutes. Also, areas that needed to be modified by client were very easy to setup.
That is just the basic part, I won't go into much detail now, but I will only say that CouchCMS also supports full e-commerce shopping cart, cloned pages, repeatable regions, editable regions, and many more.
Trust me, just to have cloned pages and repetable regions out of the box will help you create almost every scenario you can imagine.
Also, it has the best documentation I have ever seen when it comes to CMS-es, from tutorials to many references.
Maybe just one thing that would make it totally complete is some kind of user management, but hopefully that will come in the future.