Now I am a KDE fanboy to the bone, a KDE eV member and past contributor to several projects ... so I am kinda biased :D so "yes, yes you should" THAT SAID I know a lot of awesome folks in the GNOME project. People who really really are brilliant and fantastic folks the issue is that there is a culture of "be loudest and most self-assured and you're the best" in certain aspects of the project and combined with the GNOME projects stated focus on just GNOME that creates an air of snobbery among some (sadly some of the people most outwardly visible) and a tendency to demand help from others but refusing to give it when asked. Its a cycle of self-proclaimed victimhood too where they consider any disagreement as either "unprofessional" or just random hostility without reason when it comes from the outside.
Which sucks. Sucks amazingly. Specifically because there are so many great folks in the project doing awesome things for others and the GNOME project who seem doomed to obscurity because of their ability to work with others and not be blustering screaming malcontents due to the projects culture (in certain areas).
One of my favourite features love it. Happy you and people who don't want it can turn it off though so its good for all
For those who don't need/want it, go to your profile for Konsole, then go to Mouse, and then turn off "preview colours on hover"