I've been thinking about this quote a lot lately. As you can imagine, my brain comes up with a whole bunch of whimsical answers,* because it's easier (and funnier) than really addressing the question. It's actually a little hard to pin down, because my mind gets a bit squirmy when made to consider what it is that I really, really want.
Right now, though, I think an honest answer would be this: Writing a series of 5 to 8 novels/screenplays of humorous fantasy where I love the story and characters AND the series becomes an immediate and long-lasting global hit.
It's hard to write that without all the mental alarms going off, and hearing the voices of myriad writing instructors warning about setting out to be as successful as "Twilight" or "Harry Potter." But that's where the magical "If you knew you would not fail" clause helps out. If I know I would be successful, hell yes! I'll swing for the fences!
Of course the next question follows, "If that's what you want to do, is it worth attempting even if you might fail?" And my reply is... (First, let me interject that I don't plan on dropping my projects in the Eldritchverse. I want to finish out the comic. I like the thought of continuing on Kari's story and telling other Eldritch tales in various forms. There are volumes of advice columns to publish. So don't worry that this is a preamble to me announcing that I'm giving that up in favor of some other effort. Just so you know)... "Well, yes, it is."
So, I've starting working on ideas and thinking about how this all would look. And how I'm going to fit this into my writing schedule. That's about as far as I've gotten. I'll keep you posted.
* Such as bringing about World Peace through interpretive dance, or achieving healthy and energetic immortality in a way that doesn't involve drinking blood, or wishing for a million more wishes...