Two best terminal tools of Windows world - PuTTY and ConEmu provide this capability:

1. mouse selection immediately copies to global clipboard
2. right click pastes from global clipboard

This is quite popular question for gnome-terminal on Ubuntu:
http://askubuntu.com/questions/211292/a-terminal-which-provides-select-to-copy-and-right-click-to-paste


It was already proposed several times:

https://bugzilla.gnome.org/show_bug.cgi?id=582969 - copy&paste like Putty
  "...WONTFIX, it conflicts with accessibility (right click should work like it does now)..." closed by Olav Vitters

https://bugzilla.gnome.org/show_bug.cgi?id=558611 - Add option to auto-copy selected text
  "...Just use middle-click which will paste the selection." closed by Behdad Esfahbod

https://bugzilla.gnome.org/show_bug.cgi?id=542228 - copy and paste in terminal window
  "...That's by design.  Selection should not override what you have copied into
clipboard.  Please do not REOPEN." closed by Behdad Esfahbod


I am opening a new request, because:

1. current right-click menu for gnome-terminal is useless and provides much less  benefits for usability/ux than copy-on-selection/right-click workflow (YMMV)
2. middle-click is a hack and it is rarely used on laptops (YMMV)
3. ask ubuntu question was viewed 10536 times


However, I understand that strict Gnome accessibility guidelines unlikely to offer this capability be default, so I'd like to feature request this behavior as an option. gnome-tweak-tool is ok.