Let me start off by saying I am a Capricorn (boring and obsessed with my job), with a Taurus moon (boring and stubborn about it). As my queen Laura Marling says, I speak because I can. Canceling a date because of a big deadline at work? Eventually going on said date but spending the whole date talking about your career goals? Sitting in a coffee shop and not talking for four hours as you do work and calling it a date? That's my life. No tea, no shade, there are just a few zodiac signs who are the boring to date.
Of course, boring, like beauty, is in the eye of the beholder. If you're super into playing board games or reading for fun, your perfect match may be someone who's equally mellow. If you get your jollies from staying in and watching TV, you never need to feel bad for it. Liking what you like and being who are you is never boring. In fact, everyone being different and enjoying their own things is literally what makes life interesting.
Still, these three signs are historically not super adventurous when it comes to love (and yes, thank you for asking, Capricorn and Taurus are the first two).