Gen 5
Pokémon White was my first ever Pokemon Game, even now I prefer its sprites and overall look over any other generation. The overall design of the areas of the game were extremely well done. I sincerely enjoyed every single Pokemon (Yes, even Trubbish) and I like how it's not too overcrowded with a game designer trying to fit 700+ Pokemon into a single game
Every single character was great, Cheren and Bianca were amazing as rivals, they actually showed characters and had rewarding endings for the hard work they do, unlike certain others who get no reward for climbing up to the top, and there is just a sense of satisfaction when you find out Bianca is able to travel the world (well, Unova) with Professor Juniper, when her father finally allows her to go on her journey, and in Black/White two, when you find out that Cheren is happy as a Gym Leader, that his journey has got him somewhere and his wish to be big and powerful has been fulfilled
N's entire story is great, he can be sympathised with and it is easily one of my favourite villains, if he can be called one, he just seems so selfless and kind. Everything he does is just to free Pokémon
In fact, the entirety of Team Plasma is just awesome, it's not just Let's take over A to ressurect B to achieve C, they have a real reason and a real motivation. And who's not to say they aren't wrong? Their goal is right, and really they are just fighting for equality, but they are manipulated by Ghetsis.
Ghetsis
He is awesome, a cruelty never before seen, manipulating a confused child with a big heart, who sees him as his father, misleading a group of people who want nothind but good for the world, to serve his own evil agenda. Giovanni just wanted more power, Archie, Maxie and Cyrus thought they were helping, but Ghetsis, he was cold, cruel and ambitious.
The Gym Leaders are all great,
With interesting gimmicks, I remember when I first walked into the Straiton gym, with the Type Curtains, or when I went to fight Elysia (or whatever) and found a rollercoaster. They even played a part in protecting the country as Clay or Burgh or Lenora teamed up to chase down Team Plasma, or when they all teamed up to do battle with the Seven Sages, doing their job and helping to protect the region.
While admittedly Alder didn't really do much, he did have different views to other Trainers, especially Cheren, speaking as if he is friends with Pokemon, basically the views of Team Plasma, but on a more legal side of things.
I could go on for hours, Double Grass, the Soundtrack, so many more characters, I could spend paragraphs on each Pokemon. But in order to not clog up this thread anymore and sound like the Gen Five equivalent of a Genwunner, I won't
One problem though
THERE WAS NO MAGIKARP. BASCULAIN SUCKS, THE FORM THING IS STUPID AND IT DOESN'T EVEN EVOLVE!