"The problem with this question is that there are so many _different ways_ to use Mercurial. hg's core is fairly minimal and everyone I know who uses it rely heavily on core- and third party extensions to get any productive work done. Mercurial does a good job at facilitating everyone's favourite, yet obscure, workflow. There are people who prefer using things like mq (patchset queues), which until recently also was Mozilla's recommended workflow. Queues are a novel way to organise your work in progress, but is quite different from what people are used to coming from svn or git."

Up to this point your comment was true, objective, and very helpful (though I would remove the word "obscure"). Then it starts to sound like maybe you learned git first and got used to it's defaults and now mercurial tastes a little funny to you. I'm guessing this because I got good with mercurial first and then when I tried git it left a funny taste in my mouth. I thought, what is this "fast-forward merge" that doesn't actually merge anything? Why do people talk about deleting a branch when it doesn't actually delete the branch of commits in the DAG of commits, just a pointer? Why does pull do a pull (fetch) and merge (mercurial's pull just pulls, or fetches, I guess)? Stuff like that.