I REALLY LOVE THE TOP LEFT! it gives off the shape of the clock.. everything is legible! absolutely love it!
me too!- i'm liking the two on the top :)the bottom right is getting interesting
I agree with everyone that the top 2 simple ones are nice. With your complicated gears, a simple logo actually seems more effective for some reason. And really, I kinda like the second to last one on the right side. It's much easier to read since the T doesn't make the shape of the clock. And where the top 2 feel like newer clocks, that one seems like one of those old fashioned clocks.
Top right! The clock gears are enough imagery in themselves. If i was doing it i'd forget all the extra swirls and florishes.