By now, you guys are thinking, "Since Lauren makes so much of everyone's designs, I wonder what kind of design she has." Well, wonder no more. Actually, I'm futting around with 5 (yes... 5) farms so this is just one of them.
I've taken shots of my immediate neighbor's farms in miniature & placed them at the appropriate sections so you can get an idea of the spatial relationship between individual farms (I actually do plot out my farms trying to be considerate to my neighbors. I know, it's dumb. But so is Facebook.).

So yeah, my farm is kind of boring compared to the other ones. But frankly, my ideal house is --- you remember where Superman lived (Fortress of Solitude) in the Superman Returns movie? Well, that's one possible ideal. I like space. If there are trees & sunflowers & livestock then of course I can't have a big fortress made of ice, but I can still have space.
You don't see a lot of space on O'ahu. Out in Haleiwa I've seen some quaint little houses set in the middle of huge, grassy lots flanked by large, overgrown trees & I thought it was wonderful. In many more areas on the mainland this would be considered normal.
I also like simplicity. I don't want things to be too busy. So, no scarecrows for me.
My main farm --- this little one --- is low level & not anywhere near a symmetrical or organized as I would like, but once I've gotten all my land upgrades (level 25 is the last one, I believe) then I'll sit down & seriously plan my design out. I have a couple of farms that are 25+ (one of them is my neighbor there in the SE) & I'll post screenshots of them later. Editing these pics takes awhile. =)