Short nails can take more shapes than most people think (sample).
Squoval is the safe choice: square at the tip with the corners softened, so it does not catch on jumpers. Round follows the line of your fingertip and makes short nails look a little longer. A short oval works if your nails reach just past the fingertip.
Almond, coffin and stiletto need length to hold their point. On your own nails, try a soft almond with builder gel; for the long versions, book extensions.