What's the use of free will when I can have Brawndo?! It doesn't tell me what to think!
Not to be a dick or anything, but the answer to "do I want to spend 4 days locked in a tiny room with this person until they retire?" is almost always, "no."
For the most part - myself included - us pilot types are pretty straight laced and boring. Even the ones who aren't weird or some sort of high functioning sociopath have similar enough life stories so that it's kind of lame to sit next to them.
If I'm going to be trapped in a pressurized metal tube with someone, they should at least be kind of interesting, or talk about interesting things (cue Livin' the Dream video). The vast majority of pilots I know talk about a few things: flying (which is fine, we have that in common, but maybe we could talk about some of the finer points instead of just complaining about things), they bitch about the company/their job/flying/their station in life, how they're going to get rich quick, or they worry incessantly about the flight.
Very rarely I'll sit next to someone who's done other things in their life or has some truly profound wisdom to learn from, or has a diverse educational background in something completely different than aviation who's passions lie outside the cockpit and it's really nice.
As a whole, we're pretty boring as pilots. I suppose that's a good thing, but yeah, it makes for long trips.