In no order:
Seltas Queen:
Hits like a dump truck, is ridiculously heavily armored, but, like Zinogre, a great example of a skill fight. She's a lot of fun since she fights with an unpredictable moveset yet moves simply enough to give players a chance. A really good example of good monster design.
Nerscylla:
Nerscylla's an asshole, but also a total bro-tier monster. This goddamned spider has saved my ass a few times, and the fact that it will drop
everything to beat the shit out of a Gypceros or Khezu makes it a personal favorite of mine. Hits retardedly hard, but allows enough skill to be approachable by a wide array of combat styles. Genuinely a fun fight, and the first one I did with
@KidKitty. Rock on, spiderbro.
Rathian/Rathalos:
These two are assholes. And I hate them. But at the same time, I kind of love them. They're so iconic and they're such centerpiece monsters that their cheap hitboxes (RATHIAN I'M 20 METERS TO YOUR RIGHT,
HOW ARE YOU STILL HITTING ME WITH THAT DIVING ATTACK FOR FUCK'S SAKE) and asshole tendencies (
Rathalos: WHAT'S THAT? SOME ASSHOLE IN THIS HUNTING CADRE BROKE OFF TO HEAL, AND I'M SURROUNDED BY PEOPLE KICKING MY ASS? BETTER
STOP EVERYTHING AND SHOOT A FIREBALL AT
THAT ONE GUY, JUST TO BE SAFE.) just aren't enough to knock them off my list. I think I like Rathian a bit better since she's less of a dick and is generally more chill than her husband, who essentially is what happens when you crossbreed Goose from
Top Gun with the Hellkite Drake from
Dark Souls. It is worth noting that
Rathalos, perhaps emboldened by the presence of a Tigrex in the region, was also bold enough to once lead a brave solo assault on Militaire Sans Frontieres, but it didn't end well.
Zinogre/Stygian Zinogre:
Probably my favorite monster. A brutal fighter, and a tough fight, but it's not a cheap asshole like say, Emerald Congalala or Deviljho. Also,
it beat the shit out of Iodrome, which I like because
fuck Iodrome.
Nargacuga:
One of my favorites. Shame he isn't in MH4U. As much as this guy made me curse up a storm (most common being "
GET THE FUCK DOWN FROM THERE" when it decides to fuck off from the fight you're trying to have with it), I consider the number of expletives he made me scream a learning experience. He's like a more agile counterpart to Tigrex, fighting like a big cat-dragon ninja. He telegraphs absolutely every move and is, once you get it down, a genuinely enjoyable battle.
Gore Magala:
I love this thing. Even for veterans, this monster is an intimidating son of a bitch, with a theme song that
definitely gets its point across, and its infamous intro video,
which shows it curb-stomping a wounded Tigrex, gets across that Gore Magala is not to be fucked with. Gore Magala is a deadly predator that changes
an entire ecosystem to suit its needs. It spreads contagion, a virus that drives those it infects insane, and as the virus turns even the most docile monsters into violent killing machines, the resulting carnage results in easy meals for the Gore Magala to satiate itself with and stronger prey to feed upon. Resembling no other monster encountered thus far and with an "otherworldly" appearance that makes it seem like it arrived from the depths of a nightmare, this beast, believed by many to be a remnant of the Dragon Wars, earns its place on this list. Ironically, it isn't really that hard if you get down its attack patterns. Its damage output in its rage mode, however, is absolutely underpants-destroying, so there's that.
Zamtrios:
Just a plain fun fight. Even with freezing attacks, Zamtrios isn't terribly difficult for the experienced and I've had a lot of fun taking on this guy. The fact that he looks like he was invented by a child at the school I work at is a plus.
Gear Rex:
I know he's a crossover-only monster, but goddamn would I
love to see this guy in a future game. For the uninitiated, Capcom licensed the Monster Hunter engine to Konami, which they then used to make Peace Walker. In a rare showing of cross-compatible good will, Capcom's MH team created a series of Monster Hunter maps for Peace Walker, allowing you to fight Rathalos, Tigrex, and this guy. Armed with an acid sprayer and the ability to launch his scales as projectiles, he fights like a range-focused Deviljho, nowhere near as damaging or unpredictable but actually quite a bit more fun to fight.