I've used a couple of CMS platforms in my life and I think that they are all great in their own way. Heck, I've even tried to build a business supporting multiple platforms.
I believe that the platform doesn't really matter and that every user should pick not the most popular platform, but the one that they feel most comfortable with and suits their needs best. Simple.
For my own projects... I'm happy to consider any platform as long as it's WordPress. :)