GreenishTroll

I think what I like most about Minecraft is that you can change the play to match your mood. If you feel like something mindless that you can just relax with you can go mining and just dig for hours. If you feel like something more intellectually challenging you can play with redstone circuits. If you feel more energetic and aggressive you can go fight mobs. My favorite things to do in the game are mining and building castles and fortresses. That is easy to tell from what I build. I like to build structures as they might have been built in real life, making use of the existing terrain, building defenses such as murder holes and towers overlooking the gates. I tend to build simply, and large, without a lot of adornment and furniture (perhaps because I lack artistic talent : ) )
So I go with the troll persona and it works well for me in Minecraft. I dabble a bit in redstone, but tend to not get too complex. I really like boats and railways, I just wish they would be improved in the game to make them more useful.

In real life I am a project manager for a company that delivers and customizes electronic lab notebooks to companies for recording their research and capturing intellectual property. It is chemistry based and allows for entry and searching of chemical structures. I have a PhD in chemistry, but I got out of the lab immediately after grad school and have been in chemistry related software jobs ever since.