Hi! I haven’t answered this question yet and to be honest, I’m not really sure HOW to answer it now, since shaping my nails isn’t a great deal :D. I use paper and glass nail file, I go square and slightly round, it’s probably what they call squoval (?). And I usually keep short free tips. I find this shape safe (for both my nails and my skin - no breaks, no scratches) and comfortable. To shape my nails I don’t use anything else than nail files. What I focus on is to keep all my nails similar, especially in their lenght.
Thanks for your question! I hope I gave you the answer you wanted :)