The only reason to keep something like this in the packaging is if you want to sell it to someone later on.
If you actually want to own it and keep it you should open it! Especially something like this where you can't even see it without opening it.
I agree with you man, The figures I have, I opened them all. Some of my family members say that I should keep them in the packaging, I always say no because I want to keep them because thats why I got them in the first place. And some of my family members never understand, but I love my figures outside of the packaging in all of their glory.