There's nothing wrong with Cajun seasoning! I used to use either Tony's or Cavender's on stuff for years because I had a busy lifestyle, didn't always have the give a shit to mix my own spices, and early on I didn't really have the knowledge to know what was good yet. I'm just in a place where it makes sense for me and I'm very happy with it.

By the way, if you're looking for something pretty good that isn't Cajun seasoning, check out Kinder "The Blend". It's a legit SPG.