Should I rather write and print the letter with a laptop or by handwriting? Which looks better
As long as it is legible, no one does anything other than shredding with used envelopes (one hopes)
If you can write beautifully. Handwritten.
What speaks against it?
Depending on the letter
personal letters to acquaintances, friends by hand
business letters, notice of termination, application with PC
Think it depends. Some have such illegible handwriting that it would be better to do it on a PC. Otherwise handwriting.
Write all my letters on the laptop and then print them out, as I don't want anyone to use my handwriting.