You should always prefer a branch in which you are interested. So, that you can perform well. There are always jobs available for right candidates.

There are lot of opportunities in government sector including defence but this field is challenging. It comes in one of the good handsome paying job. Aeronautical engineers can have earned well in private MNCs as well. There are opportunities to work with NASA after completing higher studies in this stream.

Top recruiters in this field is HAL, DRDO, ISRO, Airlines, DRDL, Airbus Inc, Boeing Inc

Average salary in this field is 5 lakhs to 6 lakhs per annum. 

Good Luck!!