I am a classic typeface kind of person. I like clean lines in both serif (letters with the "little feet" on them) and sans serif styles (without the "feet"). I also mainly pick up black, white, red, and brown. Here's a few of the ones I keep coming back to again and again:
2. Three Bugs In A Rug Red Alphabet Stickers. This one is great for those times you want a mixed typeface set.