One should have these purely for the purposes of nostalgia. They really don't make games like these anymore. Hand to hand combat games are pretty fun and enjoyable. Favorite feature are the stories that emerge from story mode. Highly recommend!
Two of my favorite games in one. They both have customizable characters and great online play. Tekken has a ranking system in game and online so you can translation seamlessly between the two. Story line is as good as ever as well.