I started driving my 1975 Pontiac Bonneville during college after it sat without even been turned over for at least a decade.
Now it came right back to life and didn't seem to leak anything, but oh boy, the problems I encountered!
It always seemed to lose some key system when I had some girl on a date, every single time! Overheated, heater core leaking, starter went out, lost brakes! Each instance was on a different date. I think my car was a version of "Christine" and her jealousy.
Now my truck has sat for 11 years now but this time, I am fixing everything that might go out before it hits the road.