I've been using screen for a while, and the copy/pasting just behaved like being in a regular terminal window (Debian), as in Ctrl+Shift+c to copy.
I made the switch to Tmux a couple months ago and never looked back.
The only gripe I've been having is copying text selections. I simply don't know how to make it work.
There's are some shenanigans to enable copying, but somehow never got it to work, so I always end up detaching from the session, and then do the copying, then re-attach the session.
Is there any way to make the copying work just like in a regular terminal window (Ctrl+Shift+c)?