Coffee. Had tried it in the past and didn't care for it but loved the smell. Recently a coworker brought in some Dunkin' Donuts coffee and he told me to try it since I was about to fall over from being so tired. Now I have my own coffee maker.
Mushrooms, hated them as a kid but they aren't so bad now.
Also Chili, beans mixed in with other stuff like chili soup ect. (still HATE re-fried bean paste, nasty stuff) ceartian cheeses like Swiss and pepper jack I love now.