Favorite thing about Pokémon is the community in general. I love collecting, and I’ve collected many things in the past, but only the ones for which I’m part of a great community like here I’ve continued collecting for the longest time. Mostly because it’s nice to share your enjoyment with others, and also feel their enjoyment in return. In addition, I love to learn and share my knowledge about my hobbies (as can be seen by some of the articles I wrote thus far 
).
As for favorite Pokémon: Seviper. Snakes have always been my favorite animals (I have 13 snake posters hanging in my room from a calendar I once bought, haha), and although Ekans and Arbok are pretty cool as well, the design of Seviper is just perfect in my eyes. Right now I only need three more cards to fully complete my Seviper collection in all languages and variations, which I hope I will do one day. 
(If anyone has a Spanish Hidden Fates Shiny Seviper, or Japanese unlimited edition World Champions Pack Seviper or Battle Frontier trainer card, let me know please. Especially those last two.)
Greetz,
Quuador