What new hobby should I start?

I have lots of little hobbies, but I want a new, big hobby that I can partake in any time I don't have anything else to do and won't get quickly bored of or feel I do too much.

Maybe you should get into cooking.
There are lots of great magazines and websites you can look at to get some great receipts. The reason I say cooking because its not the same thing over and over again so it would be hard to get bored, and because when you done it all pays off.

I'd probably eat myself fat.

I think part of my problem with my other hobbies are is that they're hard to enjoy/do by yourself, such as making movies, or going exploring, and none of my friends are into any of that kind of stuff.

I was thinking about building an extravagant fish tank, but that would kind of cost a lot money...

Do you have a job?
That could keep you busy, and at the same time you could save money to build a fish tank.

maby you should get into the art kinda stuff. like take up painting or something. its fun and its always great to have a new skill

graffiti. (not the illegal kind)
I do it and once you really get good you can do the coolest things.
it's really amazing.
look into it.

try badmonton, its really fun!! XD