I love clocks! Although I feel they've become a bit antiquated in this electronic age. Every tv, cable box, computer, ipod, ipad, phone etc has a clock on it. So actual wall clocks and desk clocks aren't as popular.
Here's one of my favorites- called the melting clock:
And this one is beautiful...I've always loved grandfather clocks and I really like the dimensions of this one:
I think one like this would nice outside or even in a craftsman style home:
My great grandparents always had a cuckoo clock...we'd take turns helping grandpa pull the cords to wind in before bed. Even in my earliest memories I remember that clock.
This retro one is fun for a desk top (with more sleek modern ones found here):