Pokemon is so not for kids, it can be for anyone! And welcome to PC, Umbreon! How are you enjoying it here so far?
As for which Pokemon generation is my fave? It's 5th Gen for me, I just loved how different Black & White along with Black 2 & White 2 stood out compared to most Pokemon games, and the storyline was so touching with the whole N and Team Plasma plot. And it introduced my fave Pokemon of all time, so yeah that pretty much explains it. In fact, I've been playing Pokemon games for 11 years now and I know I'm confident I'll never let go of Pokemon for a long time.
And I'm sure you'll love PC because we are a diverse community with so many awesome people, so making new friends won't be too much of a problem here. The staff team are also around if you ever need their assistance, just look for those easy-to-spot bolded usernames. Have fun and I do hope to see you around the forums!
- Hikamaru