Your cumulative grade point average (CGPA) plays an important part in PS allotment. Higher CGPA guys get the PS station of their choice & the lower ones (like me) don’t. Although, if there is an opening remaining where you’ve applied then only you’ll get it; if not already filled up by higher CGPA guys. Generally, companies give offer letter to people doing PS after their stipulated time. You can safely say that it will be your first job.
Hence, if you want an organisation of your choice and don’t want to compromise on it, PLEASE LOOK AFTER YOUR CGPA and maintain it towards the sky.
Also, don’t just fill up the preference form anyhow. One guy from our batch had to suffer ‘coz of his carelessness in filling up of preference form.