This may not be valid and is purely my opinion, but I have got the impression that many operators would prefer someone (all other things being equal) with a more mature outlook! Quite often you would be flying on your own. I'm not saying that the younger CPL (say, in their 20s) wouldn't be able to do that but I don't think 37 is too old. Heck, there's still a good 20 years left in you; more if you're an instructor.
Cheers
Whirls