I've wasted $60 on a few games this gen, and for a time I felt I had to jhustify it by convincing myself that the games were worth it. As I got older, I had to face reality that all I was doing was trying to justify why I (intentionally or not) wasted $60.
$60 is a'lot of money to most people.
It is to me too. I've been selling most of my games, games I really enjoyed but wanted new ones. I sold Persona 4 Arena and SFxT to get DOA5. Loved that choice. DOA5 is so much fun. I only have 10 more bucks.
Seriously though its not so much 'justifying'. There's unlockable costumes, music, win poses, minions (I WANT KAI DAMNIT), and hours and hours of content. Saying one character isn't in is what happened to UMVC3, except in UMVC3's case it was just silly because all they really had was online content.