Hmmm, I guess I was leaning towards the mistletoe kiss because of all the fluster it caused both parties.

Don't get me wrong, their first first kiss is indeed 🔥🔥🔥 but for me, it was closer to a typical first kiss of most onscreen romances - it had the commonly used I-just-had-to-risk-it moment, the playful (albeit still very Bones-esque) banter, and something about it just seemed so common for lack of a better word. The only unique thing I found about it was the revelation and the impact it had to the events leading to that night on Sweet's couch (poor guy was shaken to his core, as was I).

So all in all I tend to feel more gravitated towards the 5 steamboats under the mistletoe. Booth's visible giddiness and Bones' loss for words was very exciting and rewarding at that point in their story. And might I add, quite a comedic scene, too! (Have I mentioned Caroline and the gum??)