Its not so different nowadays, with the exception of the mail client (but I like and use it). How bookmarks are displayed and categorized, how tabs are used (it has used tabs much longer than the other browsers), how passwords are saved and presented, and the speed-dial set up are just a few things. I would try it and see. Just be aware that Opera is generally more correct in rendering to standards, so some pages will look different, as some pages will not work, as people do program for the incorrect rendering of the other browsers (IE, FF) and these pages sometimes do not work in Opera. Same goes for some javascript. But this is not the issue it was just a few years ago. Like I said give it a try and see what you like.
Thank you. I may give it a try.