A few ideas you may or may not already do.
Use as sat nav/route planner.
Take plenty of photos and videos.
Web browsing every chance you get.
Works and Private email.
Loads of your favourite music.
I think you may get bored with any other new phone out there a lot quicker than you did with your trusty
N95.
I have simple apps on my phone like Calcium and now use it at work more than i ever thought i would and can't imagine being without it.