Maybe "tedious" is the wrong word to describe the test flying I did. "Not glamorous" might be a better descriptor.
It was a very demanding days of flying as very accurate flying is required to get good data. It took a lot of personal discipline to bare down and keep the flying to a high standard when you where in hour 3 and doing essentially the same maneuver for the 40th time.
I guess the bottom line is the TP flying was professionally satisfying but very hard work. Personally I am not sure I would want to do it as a career.
I will add a caveat as I was only exposed to one element of test flying. I am sure if you are doing the full suite of flight test cards you will find others that are more fun, however my suspicion is most of the flight testing won't be ripping around doing cool stuff, it will be a program of slow and methodical maneuvers done over and over again.