My sister pointed out that I'm a little random about mixing them. I use both, based solely on what I feel like typing at the time. And I'm acutely aware that the emojis she sees are not the ones I do, but the ASCII ones are pretty much the same, since I use Android and she's an Apple-head.
Besides, I love the slobbering ASCII guy ;-p~~~~ None of the emojis let you amplify slobber according to need like that.
I've changed my emoji writing style from the canonical ;) to ; ) just so that editors won't auto "correct" my proper ASCII emoji into an unholy yellow winking face.
I promise to never do that on HN again!