27 is a pretty cool number.

the coolest number ever - 1337. Approximate melting point of gold in kelvins.

7

3...an odd choice, I know

3. It was my first soccer jersey number.

13, as someone who struggled with their timetables, 13 felt like the verge of wild complex maths

tab width = 3

It's big enough to clearly see indents. But small enough to preserve screen real estate. And no one needs to agree 3 is best because TAB.

I like 6, maybe 7.

I find that can devalue the enjoyment kids get from their inside joke simply by being one of the olds liking their new favorite number(s).

4 is a good number, but I can't explain why, just feels right

All of the Sacred Geometry numbers, mostly because they should up in computing just as much as they show up in Geometry, Astronomy and overall in nature.

Also 45,000,000,000 because [1]

[1] - https://www.youtube.com/watch?v=4J9MRYJz9-4 [video][1min]

I like zero because it's not easy for everybody to put their finger on.

In some cases you can't even be sure if it's there or not ;)

4, because it can be written as 2+2, 2*2, 2^2, and all the other following hyperoperations Hn(2,2)

91, which to me is a prime number no matter what the maths say