corn snakes and ball pythons are two VERY diferent snakes.
corn snake care:
http://www.reptilerooms.com/index.php?categoryid=20
ball python care:
http://www.reptilerooms.com/index.php?categoryid=16
first off i must say thought that the ball python sounds more for you. the tend to sit still more, corn snakes are always on the move exploring. ball pythons just chill where they are at more often.
I myself like corn snakes more because i think they like to be handled more that ball pythons, BP can also be problem feeders...
NOTE:
No snake will "Enjoy" going around town with you, you should get a puppy or rat if you want to do that. I know that it will be "cool" to chill on the park bench with your snake but think about the snake too please, he will NOT enjoy it, at all.
I think the corn snake may handle it better than the BP with tend to be more stressed easily, but corns like to explore alot too. you would need to put it in a carry cage while you drive cause he wont just sit there. but the BP should also be in one while driving...
*crash* oficer im sorry my snake slipped to the ground and slithered over the gas pendal...
Good luck i love snakes too! -please remember how your snake feelks about your "outings" too though.. if you must start small and short trips..