Look things change form month to month. One day United is great, the next they are bottom of the barrel. Do what you think is right for YOU. Real pilots accept you for the smart choices you make, not who writes your checks. You will be welcomed to come to United, but we will always respect your choice.
Profession is always more important than employer. Work at United, jetBlue or any where else, but what matters most is what you stand for. Support your fellow pilots, and they will support you.