Hmmm. When I was first into Pokémon I played the games, collected the cards (card-collecting seemed so much easier back then, though!) and watched the Anime. I had no idea that a Manga existed (as these were the pre-Amazon and eBay days) and thanks to us only having dial-up and one computer that my Dad neurotically played Heroes of Might and Magic on, the only way I could get involved with the fandom was at school. And people didn't really fangirl/boy at the school I went to, so we mainly talked cards.
Now that I'm older, I play the games (all of them), I'm just starting to research competitive battling (but all of the people who are advising me are way younger than I am, so I don't think that competitive battling is an "older" person's thing necessarily), I still watch the Anime (but mainly for the older characters like Professor Oak, Brandon, Byron, etc., although I do also root for Paul/Shinji) and I'm just starting to look into scripting because it seems fun. Oh, and I'm collecting the PokéSpec and DP Adventure! Mangas and heavily fangirling everything about them ^^.
But I don't think that from my angle any of these things are to do with my age; I think it's because I now have my own laptop, my own internet, so I'm able to research and do more of these things on my own steam. I miss absolutely nothing about a dial-up modem other than the rare happy windows when it would actually connect to the internet. -.-
Also, I need to dig up my old cards. I want to make bookmarks from them. XD (I have like 32 Bulbasaur cards from where I went through a MAN I LOVE BULBASAUR stage lmao).