Thank you. I hate it when the OMG X IS THE BESTEST COMPANION EVAH AND EVERYBODY ELSE SUXORS! crowd rears its ugly head, and avoid the anon meme like the plague, as these things tend to set my teeth on edge. I don't have a least favourite companion (unless Adam Mitchell counts) because I can't be bothered to go find something wrong about them, being too busy finding exactly what they did as part of a specific Team TARDIS that made them stood out, for example. Or what their biggest strengths as part of the team were. Because of this, I just cannot comprehend people who try to bring a character down just to validate their favourite.
And this goes for shipping as well. As you know, Doctor/Jamie is my OTP, and I have quite a few others I'm rather fond of (for instance, I'm now fascinated with the possibilities of Harry/Victoria) but I have no trouble with any other pairing, and I don't think the world revolves around my ship of choice. And, as you said, what's the big deal about platonic love? It's still love, no matter what its nature might be.
*sighs* It's the shippers rather than the ships that make me cringe, usually.