I've always thought that cars look like people and the Peugeot 107 looks like a cheeky little boy! Really love it. He drives like one, too, the engine really has a kick to it. For my purposes (driving to uni and back) he's absolutely perfect, although I get the feeling that if you wanted to take him further afield he might struggle a bit.
For a young single (sob) person like me, the size isn't really an issue, but I did attempt a 'road trip' once and found that four people plus bags is a recipe for cramp. I can't complain though because if he was any bigger he wouldn't be as cute. He's also extremely reliable, I've had virtually no problems with him whatsoever. The drive itself is fun and although it gets a bit bumpy at times he's very comfortable so it's OK!
So my Peugeot 107 is safe, reliable, fast, compact and cheap to run and I recommend him whole-heartedly! For someone like me there really is no better option.