I've found that the main difference is how you work as a developer. If you're happy using a clicky interface to get your work done, more power to you. I need to be able to script everything I do, because I don't like to repeat myself. The rigmarole of restoring a db from a backup in SQL Server is just insane compared to the 4 second command I could issue at the terminal for postgres.
I know it's going to sound like a total exaggeration but I literally can't use MS products for more than a few hours at a time because of the pain I get in my arm from using the mouse. And trust me, it's not just because I don't know my way around - I spent years developing on that platform (and will never go back).