I think my most controversial Star Trek opinion has to be:
Everything made before 1989 – The Original Series, The Animated Series, TNG seasons one and two, and all movies before Star Trek VI: The Undiscovered Country – are only "broad strokes canon". It more-or-less happened, ish, but specific details are not shown accurately, and problematic lines, scenes, performances, characters, effects, designs, etc can be safely ignored.
Yes, I'm afraid that means I regard Voyager and Enterprise as "more canonical" than The Original Series.
Oh – and Star Trek V: The Final Frontier never happened at all.