You should always choose a branch according to your interest.

Every branch is good in engineering. There is lot of scope for a right candidate who have desired skill.

If we compare the branches then CSE is the most demading branch among students and has good scope in the future in terms of jobs and placements. Highest number of packages are from CSE branch only.

Apart, from computer science engineering ECE is the most demading branch followed by Mechanical.

You should focus on to get top colleges of engineering to get good placements. There is lot of competition envolved in enginering for top colleges. So, you should prepare accordingly. 

Good Luck!!