Sure. My primary motivators were:
Performance (it always seemed slow even to access the web interface, and ssh pushes and pulls often took forever)
The war is over, Git has been crowned the victor. I backed the wrong horse about 8 years ago and now it is time to move on. The only reason I chose Bitbucket in the first place was their support for Hg.
The way they have handled the move to Git was terrible.
GitHub now has free private repositories, and as of yesterday you can have teams for free
Realistically, the only thing keeping me on Bitbucket for several years was the pain of moving all 100 of my repositories over to somewhere else. They forced my hand with this and I have not looked back since.
Since then I have found other good things:
GitKraken is incredible
Visual Studio has really nice (simple) support for Git with the Git extension
I don't have to remember how to pronounce Atlassian anymore