Why is University so wanted? Can someone tell me why? I've never played it myself so I'm interested.

I’m a legacy player and I love having the option of giving my sims a higher education or have them carve out a different path. The option to choose is great, and Uni has always added a lot of fun extra options, a lot of new gameplay and cheaper, useful objects.
I went to Uni myself and loved that, so I love sharing that experience with my sims.