Great thread. For me, collecting turned from enjoying the diversity of pokemon themselves to enjoying the variety in artists and their styles. Each individual card is unique because each artist evokes something different.
For example, Mitsuhiro Arita is a favorite of mine because his artistic range is very extensive. From pencil sketches, watercoloring, digital coloring, even CGI- he always does a great job with details and making his illustrations realistic. This Ho-oh (although not a card) is a perfect example of his work. The vibrant colors of Ho-oh, the golden leaves, the individual roof tiles, the season, the background, the pose of the pokemon, it’s chef’s kiss.
Another artist I think is underrated is Ken Sugimori. Unlike other artisit who are freelancers, Sugimori works for Gamefreak as art director. I’ve seen some folks claim his art is boring. You have to keep in mind that his official illustrations were intended to introduce people to pokemon in order to understand the appearance/personality of each pokemon. This is the case with early artwork in general, they were meant to introduce children to pokemon and so they did not have the artistic freedom as they do now. Like Arita, Ken also has a large artistic range and it has evolved a lot from his early watercolor style to his modern digital work. He’s truly capable of delivering fantastic illustrations:
A few more:
Kagemaru Himeno, full of light and bright colors, really brings out the charm of cute pokemon:
Kawayoo, one of my favorites, you can tell each work has many layers for brushes and lighting, abstract backgrounds, amazing at capturing dynamic poses and expressions.
Tokiya, similar to Kawayoo, he excels with digital work, the backgrounds, the shading, energetic movement, very bold illustrations.
So many more: Tomokazu Komiya, Atsuko Nishida, Hajime Kusajima, Naoki Saito, Masakuza Fukuda, Kanako Eo… I can go on and on but it’s probably best you check out a site like Illustrators | The Art of Pokémon and check them out for yourself.