I bite, but I do a controlled bite. Let them get a little long, then gently bit the side of the nail and slowly pull it as it disconnects. I usually have pretty straight nails but the method isn't always perfect and every so often I get hang nails or pull too much. It heals in a couple of days though so not a big deal besides being annoying for a little bit.
Edit: forgot to add that I don't use clippers or filers cause they hurt when I use them. Biting hurts less and I have more control and I can make the nail more even then using either of those.
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