I would LOVE to actually visit every state. I've been in many, but often as a kid so some of them I don't remember.
I'd love to visit and have time at every National Park.
I'd love to visit all the "ghost towns" that are left.
I want to visit the Alamo... and the Grand Canyon (only 6 hours drive... I really SHOULD just go!)
I want to whitewater raft the Snake River.
Out of the country... I want to do a birding expedition of the Outback in Australia... want to visit Greece, Spain and Italy. Someday make it to Switzerland, Denmark and Norway... really want to go back and see more of Scotland (the highlands) and England as well... and I'd love to have time to explore the provinces of Canada... I've been to BC only and loved it.
clearly I need more time off and better pay.
There is a fine line between "hobby" and "mental illness".