I get exactly the same thing. I think it's pure coincidence. 90% of the time I look at the clock it's something like... 3:33, 10:10, 16:00, 00:00...
According to numerology, your subconcious mind is trying to tell you something. According to Google, you are not alone.
this is a kind of strange, but not really if you're asking me...it used to happen to me too some of these freaky patterns of clock hours especially when I'm calling over the phone I notice it... when I see the time details of the calls