I think the idea here is just to think... hypothetically, if you could specify the perfect for you "extra" guitar. Be it a campfire guitar, or the one you take with you on a short road trip, playing around in the back yard or at a family style get together. No tossing it in the fire, and no one so drunk that they'd crush it LOL! I personally bring my Martin along with me to the campfires. I took it to PA. I haven't packed it in an airplane yet, that's too scary. I think we're talking a guitar that would alleviate some GAS and put a smile on your face. Of course a one off custom would be expensive (Martin- basic no frills guitar from Koa - ok, that'll be 7 grand) but we can dream! Anyhow, I don't think we're talking custom, just... what are the features that you would want in such a guitar? If you COULD have one made to your specs, what would you ask for?
12 fret, so you've got a shorter neck for ease of travel (and it has no need to be extra loud). I don't have a use or a cut-away (what the heck do you do beyond the 7th fret? LOL). 00 size, I agree with Ken on that one! A slotted head stock, to keep tuning pegs out of the way from getting bumped (with closed tuners, so dirt and grime doesn't get into them). I like Joe's idea of the locking pegs though I've not yet strug a guitar with them, or really paid much attention to the ones here that have 'em. I agree with others that laminate sides and back are probably a good idea. If I'm paying over $500, it needs a solid top. WHAT MATERIAL? I'm not sure... I'm so partial to my mahogany and so far everything else I've heard sounds similar to my ear (or rather, NOT mahogany). I suppose a standard sitka spruce top is fine, especially to keep the price down. That said, I really think I'd like my next guitar to be Koa, and since I'm dreaming here, I also want a heart shaped sound hole. That's not happening, but still I just had to toss that in there. Basically, nothing too jangly (yes, I realize Koa starts off jangly, but it should open up to a richer sound).
Most important is play-ability. I'm with Roger, can't stand the big rounded back necks I've found on Gibsons. I don't mind a wider neck, but I like them fairly flat in the back. A low oval shaped neck. I tend to have issues with a neck that's too skinny though (which I find happens in a lot of electric guitars). A pick guard is essential (tortoise please). I don't think it should have any on board electronics. I'd rather bring the clip on tuner along. It should have strap buttons ready to use (a minor thing sometimes not added). Binding, inlays, rosette bling are all unnecessary. And along with the looks, lets see the wood. Tusq nut and saddle.
OK - so what about bracing guys? I don't know anything about it, but I do know there are opinions out there.
Art and beauty are in the eyes of the beholder.
What constitutes excellent music is in the ears of the listener.