I'm a full time SharePoint developer and have been since 2011. The biggest clients I have been working for use Nintex for their workflow needs and I've been responsible for creating most of their workflows.
In the beginning I worked with SharePoint 2010 and since since 2013 I have been working mostly with SharePoint 2013.
I've made workflows for almost anything you can think of.
Provisioning new sites, managing permissions, project approval workflows, notifications, working with web services, user defined actions, and the list goes on.