Well, as long as you and your partner have an agreement, and you BOTH play the same way, you can do whatever you like! (as long as you tell your opponents that when you lead a queen it promises the king, and NOT vice versa

Bridge is a game of full disclosure, to make it as much about skill as possible)
And keep in mind that if you ever play duplicate or even in most kitchen bridge games, everyone else will lead K from KQ, so you should always be watching for those things as declarer.
I would recommend that you stick to one style and do it regardless of honors. So if you want to lead your 2nd of touching honors, then not only will you lead Q from KQ, but also J from QJ, and T from JT. The question remains, what will you lead from KQJ or QJT? For consistency, I'd stick to the 2nd best if that's what you prefer.
You wrote: "As long as my partner knows my quirk... we should be OK, don't you think?"
As I mentioned above, you'll be OK as long as (a) your partner knows your quirk, and (b) your partner agrees to play the same way! You can't have different lead conventions depending on the partner. Stick to one style between the 2 of you, watch each other's leads, and you'll gradually get used to figuring out what everyone else holds in the suit that gets led. If you don't have a solid agreement about what you're leading, and then stick to it, then you'll always be in a haze and your defense will suffer.
"PS -- So, do people still say they're "sitting with the bathtub" if they've been dealt a lot of good hands?"
I don't think so, because I've never heard it before! Then again, I haven't played much kitchen bridge, and that sounds like a saying that would have sprung up during home games rather than tournaments