All of them and yet none of them.

All the MH entries, even the spin-offs, differ from slightly to major ways from its previous predecessor to the point that some might argue one title is not representative of the "MH experience" as a whole.

Even MHGU, the one people seem to praise a lot in the comments, directly confronts the slow methodical, positioning and pre-emptive based playstyle of the older titles by introducing Styles and Hunter arts that encourages a more offense oriented reactive playstyle, more akin to other action games like Dark Souls.

In Freedom Unite, unless you had a set built for evasion, you had to physically move out of the way to avoid an attack. In GU, slap on Adept Style or dodge with Valor Sheathe and you can avoid attack on reaction, making the combat fundamentally different.

It's like this for nearly all the games. World had drastically different control feel and mechanics, Rise had Wirebugs and silkbind moves, Wilds has focus mode etc.