I'm more than willing to make an investment, I was a WoW junkie for 8 years. MH just hasn't clicked with me the times I have tried it.
The discussion on MH is SUPER fascinating to me. My first jump in was the first version on PSP. It was fun, but really frustrating. I couldn't wrap my head around the idea that no matter how many times I killed a Jaggi, I wasn't getting stronger. The same thing when I fought a Kut-Ku. It didn't make sense that (especially as a complete newbie to the series) I could kill this thing 100 times and still be just as squishy to him.
I didn't get deep into that version. I imported one of the games a bit later, and STILL found the same issue. What clicked for me was when I played the Wii version online with some friends.
The beginning of the game is brutal. It's slow, it doesn't explain much, and it doesn't help you "feel" progress. When so many other games hold your hand through the initial stages of gameplay and guide you to understanding the process of getting stronger, being exposed to the MH philosophy of progress is a real wake up call. You don't "level up" in MH, your stats don't increase with kills, movement and combat are animation based (something that REALLY turns people off), and you don't EVER get to that point of being unkillable. Ever.
The game requires you to be skilled. It requires that you learn the enemy, understand how to approach and attack it, how to AVOID it, and (arguably the most important thing in MH) what to bring with in your hunt. Everything from health potions, whetstones, traps, bombs, paintballs...And then making sure you've crafted and equipped a set of armor that is adequate for the hunt AND that your weapon does the same. There's a LOT of shit going on in MH.
The best thing a new player to the series can do is to force yourself up to the first "major" encounter of the version you're playing. Be it a Great Jaggie, a Royal Ludroth, a Qurupeco, etc. I think once you've killed and captured your first big monster a few times, you can really know if the game is for you. Wandering around fields gathering meat, mushrooms, and ore is part of the experience, but it is NOT the game (contrary to what the first 10 missions or so lead a new player to believe).
Trying new weapons is also something that can spark your interest. I used Sword and Shield for the longest time. I didn't really consider other weapons when I first started. Once I tried Lance and now Switch Axe, things got fantastic - and my playstyle completely changed. SnS is great for newbies because there aren't too many tricks to it - it's just relatively weak in comparison.
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tl;dr - I love Monster Hunter, as do many other folks. It is
NOT the game for everyone, though. If anyone is interested in getting into the series, it's best to push through to your first major encounter and do it a few times. If you enjoy that experience and the progression of skill through learning and adapting, congratulations - you're in. If you find that you simply cannot enjoy the big fights and the animation based movement and combat, that's OK - probably not for you.