I think there has to be an aspect where quantity supports genuine experiment too: for example, Finder & Keeper did nothing for me the first time out, but this time it clicked, and if John & Leah are going to take it down the Folklore route, I'd be happy to see more. Similarly, while I'm not the target audience, Justine and In The Cold Dark in T&J hit the spot, along with Full Tilt Boogie from last year.
If these issues were one-offs, there'd be no opportunity to build a sustainably broad stable of successful All-Ages stories, but as The Plan ramps up I find I already have almost a full comics' worth of things I'd really like to read. It's not about my likes, but presumably I'm not alone.