I'm most comfortable in Photoshop and each time I fire up Sketch I find myself moving back to Photoshop. I know this is bad and want to get better at Sketch as I understand it's a more suitable tool for the job (vector-based, etc.).
I do the same thing. It usually takes me about an hour or before I hit a bug or, more rarely, a crash. Then it's back to Photoshop. I've repeated this cycle about once a quarter for a couple years now.