Bailey's is a little different than the others because it has creme in it. They recommend refrigerating it, and not keeping it for more than 24 months. Also don't drink if it gets lumpy...if you needed to be told that.
anything that has cream in it should be refrigerated and consumed toot suite!
I opened a bottle of something called "Scoops" at the inlaws and couldn't pour it - it was solid! (yuck). Of course my DH says that bottle has been there for about 20 years.