Happy b'day!!
There were folks who were tellin me "oh 18 doesn't feel special, 21 does." Well, 18 gets you a lot of convenience since you can sign your own papers (w/o that pesky 'parent signature if minor' requisite). You can also buy your own cold or allergy medication that contains decongestant (Pseudoephedrine) which is great for me because my allergies have been killin me. And you can also buy cigarettes and lottery tickets.