PostgreSQL did not support Windows 7 back in 2010. I don't know if it does now nor do I care, but you might. See these notes.
I personally used PostgreSQL to good effect on a project at Hewlett-Packard before abandoning it in favor of MongoDB. PostgreSQL is a great database and it's nothing to do with Oracle (MySQL, which would otherwise be my choice since I've had a lot of experience dealing with that). Here's a useful list of features to consider:
25 Features your Developers are missing when not using PostgreSQL!