The most important feature is the SSH (must have), after this comes Web-Cronjobs (nice to have)... and than a long time nothing ... and than the support for PureFTP...
But this is just my own mine.
And your "own mine" doesn't matter since the poll says in order:
Website Cronjobs ( Available options will be: Full SH, Chrooted SH using jailkit or URL using Wget )
SSH access (Available options will be: Full SSH and Chrooted SSH using jailkit option)
Support for PureFTPd