I think you can love your viva, but probably only after the fact. Before it you can be excited, but you’ll still be wondering, “What if…?” about something. You can look forward to it, and it will probably go well, but you can’t love your viva until you’re all done.
Roses are red/Violets are blue/You’ve got this far/You’ve got this too!
You can only love the viva after the fact, but you can love your thesis and your research before you finish your PhD. Maybe you don’t feel that way now.
Find your reasons. Look for them. Don’t just read your work and try to memorise things. Look for reasons to be proud. Look for reasons to be happy. Look for reasons to shout from the rooftops that your thesis is amazing and you love it!
Get to the point where you ♥ your thesis and I think you’ll ♥ your viva too.