For people peeing on the 38, you could get both, and then when you feel like less of a man (person?), you can strap on the 42 and feel 'all that'...
I've passed up a few watches because they appear to have been made with one goal: To look big, and that doesn't work on my wrists well.
I don't need a MASSIVE watch that gets hung up on clothes, brushed against walls, leaves hideous marks on m face when I fall asleep wearing it...
It's up to personal taste and that's just as amazing as the concept of 'beauty'. You can't legislate it, you can't understand it, you can't explain it, and everyone doesn't see the same thing a beautiful as others.
I've seen women wearing HUGE watches. Old Seiko and Heuer monstrosities. Some like the 'fashion statement', or maybe the upper arm workout. To each their own.