There are a lot of conspiracy theories that i came across while i conducted my research. Some of which i m gonna share with u now & then if anyone has a different answer or has come across a much better reason, drop in a line, well u can drop in a line anyways .....
1. Most watch companies have their logo under the 12, hence it gives a good look of the logo if the clock is set at 10:10
2. Its a smiley face
3. JFK was shot at 10:10 & its a tribute to him
4. Lincoln was shot at 10:10, hence its a tribute to him
5. Its gives a sensation of something friendly & welcoming (open arms)
6. Its a promoto for safe driving ( keep ur hands on the wheel at 10 to 2 position)
Well that is pretty much what my research revealed, let me know if u have any more information on it.
Have a good weekend everyone..
Cheers!