When I'm sad or depressed, I feel "stuck". All my side projects, all my fun hobbies, everything I normally get excited about goes on hold. Heck, I can't even function properly at my job. The feeling grips me and causes a dull headache. I feel alone and I can't shake it. Normally, I can be alone and pursue all my fun passion projects. Or be able to learn. Or perform my job like a man on drugs.

When sad, though. I'm a zombie. Nothing inspires creativity, nothing makes me excited. When I feel like that, I'm definitely not in my comfort zone. If you want help with your research, PM me and I'll be happy to share my experience with you.