Well, a switch in my brain must have been flipped in the last few days, because I now find the DS "Phat" design rather appealing. In fact, if I had the dough--and if I didn't want a DSi, too--I'd do my best to nab one off of eBay.
In a perfect world, I'd pick up a DS "Phat" that's been modded to look like those old Game & Watch machines (like this one). Of course, this Koopa Troopa-inspired design is pretty terrific, too:
Which DS design do you prefer: DS "Phat," DSlite, DSi or DSi LL/XL?