Work numbers get the 5 tones from Close Encounters (I was happily surprised just how many others here use that ringtone 
)
Wife gets the LOUDEST ring (generic in the phone)
I also use the Imperial march,
Chewbacca’s “aarrrggggggg”,
Homer’s “32 doh’s”,
a recording of my 1 year old’s laugh (gotta love that one),
“Stay on target” from SW:ANH,
“I am e-vil Ho-mer”,
amongst a few others.
Oh, and the classic Star Trek commumicator “clicks” for new voice mails.
I’ve got “Thunderstruck” in my collection.
I had to make my own, since it wasn’t available anywhere I could find. That was surprising - it’s “First Call” which is the bugle call before a horse race.
My backup, also homemade, is “Bulbous Bouffant” by The Vestibules.
Mine is the Indiana Jones theme. It makes me feel intrepid. Especially when it goes off in the ladies’ restroom at Target.
My default ringtone is Bon Jovi’s Halfway There. If it’s my mother calling, it’s the Rolling Stones’ Beast of Burden. If it’s my wife, it’s the Doors’ Touch Me.
I got it here. Has just about every format used by cell phones, though depending on the make/model of your phone, it might be hard/impossible to get it on there.