I like Southwest, because you check two bags free, you can change for no change fee, and cancel and not lose your money. You can wind up separated from someone you are traveling with, because there are no seat assignments, but you can pay to be in group A if that really matters to you.
About 15 years ago I used to fly Spirit and I liked their newer planes (not all routes had new planes then) and the upgrade to first class was extremely reasonable! $50 or $75 and you were in a much larger seat up front and they gave you snacks. No idea how it is now.
Delta is good for a decent size cup of soda. Other airlines the glasses are smaller. The problem with Delta is if you have to connect through Atlanta. You’re in NY so probably you have a lot of nonstop choices, depending on where you are going. Are you flying out of Westchester?
I have never flown Jet Blue, but a lot of people like that airline.
American for domestic flights is nothing special, but nothing bad. Full of New Yorkers and Latin Americans. You are more likely to hear clapping after landing than on other airlines. LOL.