Sorry I was unclear.

The most common I meant - easiest to find and cheapest to buy.
I'm asking because when I built my nixie clock using PIC16F1519, many many people asked, whenever I can port code to PIC16F887, because it is much easier to buy than 1519.

P.S. I've slimmed down my code to 2106 bytes Maybe I'll fit it into 16F628A