PSU is fun, I kinda like its characters, the story is serviceable. AOTI improved a lot of things, but it is Episode 2, so you need to play PSU first (you can import your PSU save to PSU AOTI). Too bad Episode 3 was online only, when things started to get really interesting... But yeah, unlike everyone here, I don't hate PSU. It's fun. When I first played it, I wasn't expecting a new PSO or something like this, the same way I wasn't expecting PS V when I first played PSO1. So, enjoy! And may it be the first step in a very fun journey!