I asked, but she turned me down. And I'd already bought the corsage
That's a shame. I was going to suggest pulling out your PHB, dusting it off, sucking it up, and playing a PHB-only PC for a while. During play, be cooperative, demonstrate your superior rules knowledge, while be flexible enough to say "I've always done things like
this, but it's interesting to see how you guys interpret things."
I basically did a similar thing but kind of opposite, and quite by accident, slowly started noticing my new group looking to me for rules clarifications, errata information, and judgement calls. The first time it happened I almost didn't realize they were asking me for a ruling.
I joined the group with a much more casual gaming background, and more of an interest in story and fun than
rules (...a very RAI approach, IMO). They played a VERY rules-heavy game (...very RAW). Whenever things ended up being ruled in a way I disagreed with, I'd often remark (before I had time to shut my yap and let it slide) about how
I'd have adjudicated things, or built a character, what-have-you. But I was always careful to follow it up with something like, "but I'm happy to do things your way. I'm always interested in trying different things out."
Now, it's entirely possible they just go tired of hearing me say "Huh..." but eventually they started looking to me for how to adjudicate a tricky situation. Or I'd get an email about a potential new feat or power for one of their PCs. Now, something will come up in game, and one of the usual DMs will occasionally pause, and ask what I'd do in a similar situation in one of my games when there's a gray area.
The group, and I, eventually found an equilibrium between RAW and RAI. It works for us, and we have a very enjoyable game, even if I occasionally gripe about an interpretation that went counter to my (clearly superior!) argument.
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