I usually have a hard time having or picking one, single, most favorite thing (song, food, brand, etc.).
That is why lately I have been (kind of) trying to "define" some of my "favorite" things.
The thing about favorites though is that they can change over time.
I feel that a "favorite" for me, can only come when I am very convinced/certain that I like it A LOT.
As if it has to "earn" the "title" of "favorite." 
(Geez, what's up with all these "quote, unquotes"??)
Anyways... here are some of my "defined" favorite things (even though, there's the chance that they could change in the future):
Favorite color: red.
Favorite movie: Titanic. 
Favorite Bible Chapter: Psalm 51.
Favorite flower(s): rose and cherry blossom.
Favorite clothing store: probably Forever 21.
Favorite season: spring.
Favorite TV channel: I guess Food Network? (I tend to watch that channel the most.)
Well, that's all I could think of for right now. 