Yeah, 3b was kind of a fall back for if they're just like "oh ok, that's cool", which they could be either because they're ambivalent about doing whatever, or they're ambivalent about doing whatever *with you*, or because they give you more credit than you're worth
Good idea about setting it up as two options - something along the lines of:
"I really wanna do cool thing X, but also keen to do also (but less) cool thing Y, but just got to sort out my plans I'll call you later bla bla bla"
...
"Damn, thinking about it, you won't like X, it'll be too whatever. I'm gonna head out to Y with that HB you know, why don't we do Y later/earlier."
Now the question is: do you organise to do it earlier or later? It probably depends on the person, but it seems to me that it should be later, otherwise it makes you look a bit needy...? Or are you at risk of being so careful about not looking needy that you are impossible for them to get to?
As for cool names... hell yes, marketing counts for a lot. But I'm not setting myself up to be some kind of uber-PUA, and I can't be bothered wasting my time marketing to everyone else here.
P