For a small team like ours, with lots of small repositories, it's a no brainer.
When you're developing an open source application, though, you need the community of Github. I'm hoping that changes in the future. Not that Github goes away, just that alternatives are equally as viable to build a community around.
I've few complaints about bitbucket and when you consider it's still free for me it's insane (I've felt so bad by how much I used it I kinda wish they would charge a few bucks a month sometimes).
Unfortunately, bitbucket lacks some features: their markdown syntax does not allow HTML and they have no views / downloads statistics. The lack of statistics means that their search feature is not so good- no way to sort by popularity.
I'm trying gitlab now: it also doesn't seem to have views/downloads stats. Also the web-site was slow a few days ago.
The lack of statistics is odd: even sourceforge has this.