I think the Angels is actually a great choice. Having Trout and Ohtani on a single team - combined with some other decent players - will really change the shape of that division. Should be exciting to see, if he pans out the way the hype suggests!
I had an interesting conversation with a baseball maven friend of mine, and he argued that it almost makes more sense for Ohtani to go to a NL team if he can play a decent outfielder in a platoon formation. The argument is that as a DH he's replacing a slugger in the slot, so it's likely he'd only be a middling-good DH. But replacing the (normally awful) pitcher spot in an NL rotation every 5 games, the increase in offensive WAR would get noticeable. And if we can play platoon in the outfield, that gives him even more value. The last seems a bit of a stretch since they probably don't want to risk the health of their pitcher for a middling good offensive player, but the DH vs. pitcher slot is a good point.