I don't care about WiFi on a 60-100 minute flight really. I find KLM's short-haul product is overall pretty solid in comparison to their competitors - especially because of Economy Comfort. Yes some people complain about but it beats regular crappy Y for sure. On that note, KLM's business class also beats many others because it's at least the EC seats with an empty seat guaranteed rather than plain old 31 inch pitch economy seats as on a number of other carrier. That's maybe faint praise but the market is what it is, and you take what you can get.
Beyond that, I actually like the food they serve better than that of their competitors as well. Also, AMS is a good connecting airport - better than CDG/LHR/FRA - so that's nice too. All in all, KLM is my airline of choice within Europe.