How to hold terminal open (excepting gnome-terminal)?

You can achieve this in any terminal emulator by the simple expedient of arranging for the program not to exit without user confirmation. Tell the terminal to run terminal_shell_wrapper which is a script containing something like

#!/bin/sh
if [ $# -eq 0 ]; then "${SHELL:-sh}"; else "$@"; fi
echo "The command exited with status $?. Press Enter to close the terminal."
read line

If you want any key press to close the terminal change read line to

stty -icanon; dd ibs=1 count=1 >/dev/null 2>&1

There are other terminals that have options to keep the terminal open, some by specifying a profile with that setting enabled (just like in Gnome Terminal) and some with a specific argument.

Xterm

xterm -hold

from $(man xterm):

-hold Turn on the hold resource, i.e., xterm will not immediately destroy its window when the shell command completes. It will wait until you use the window manager to destroy/kill the window, or if you use the menu entries that send a signal, e.g., HUP or KILL.

Running xterm --help, one of the lines is

-/+hold turn on/off logic that retains window after exit

To see if other terminals have a similar option, look at their help or man page.

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Konsole

(default in KDE):

konsole --help shows this line:

--hold, --noclose Do not close the initial session automatically when it ends.

So, the command to use for Konsole will include:

konsole --hold or konsole --nonclose. It does not need quotation marks. It could be something like:

Exec=konsole --hold -e mediainfo -i %f

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Xfce4-terminal

Tab Options:
  -x, --execute; -e, --command=command; -T, --title=title;
  --working-directory=directory; -H, --hold

So:

xfce4-terminal -H -e '<command>'

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Terminator

It has an option similar to that in Gnome Terminal, you have to create a profile - e.g. called "hold" - with that option enabled.

To run command and stay open:

terminator -e '<command>' -p hold.