Keep Seeing 3:10 With no Special Meaning

My thought is that you also see other numbers, but that 3:10 is the only one you remember.

A person remembers seeing a certain number when they give it more mental attention than they give other numbers. That extra attention makes the memory more likely.

Although 3:10 has no special meaning to you, there is something about it that results in you giving it more mental attention when you see the number — perhaps a "there it is again!" recognition.

Determining what it is that results in you giving the number a bit more attention is outside the realm of numerology and more in the realm of personal experiences and preferences.