I always switch it up, most of the time without even thinking about it. I remember a situation I had with an HB8 a few weeks ago. We were texting back and forth for about 5 or so minutes, a few sexual innuendo's were dropped. And here's what followed:
Me: I'm just good like that haha.
Her:

(she sent two of these, back to back)
Me: Two smiley faces...you're thinking about me already
Her: You didn't tell me you could read minds
Me: It's just a little something I do for shits and giggles lol
Her: You do it well.
Me: I do a lot of things well
Her: That's a relief.
Me: Of course it is haha
Her: Educate me.
Me: Where do you want me to start?
Her: What do you do best?
Now I don't respond for a good 5 minutes, breaking up our testing banter. So she sends the same text again... I already knew I was in before we started texting, but that sealed it right there!!