PAPASTAINPhunkAny particular reason why you want the numpad? Because I my experience it is far more comfortable and saves on space if I don't have it.
There are totally reasons to have numpads too though but that's just my 2 cents
I'm obviously not OP, but when scripting in tf2 it's nice to have a bunch of extra out-of-the-way keys to load certain configs for stuff I wouldn't want to manually type into the console, but I also don't want to hit accidentally, like viewmodel toggles and hud_reloadscheme
I didn't answer the question initially because I wasn't really sure how to phrase it.
My current TF2 configs don't utilize a numpad because I try to keep the configs on my laptop and desktop as similar as possible. (I am playing mostly on my dekstop now, but still occasionally use my laptop)
That being said, programs I use frequently such as After Effects have shorcuts on the numpad that are incredibly useful, and not easy to change to other keys. A numpad would also allow me to bind my Razer mouse to those numbers (I use a Naga Hex) and make room for shortcuts on the other numbers, easier for my left hand to reach.
Basically, while I don't use a numpad specifically for TF2, I do have other programs and places I can use it, and would prefer to.