Very sad news indeed.
I have fond memories of booking tickets (cash tickets in whY nonetheless!) and actively scouting for the A380 or A388 expression in the flight lists that appear. Given that the vast majority of my international travel has been to BLR, I've done the MEL-BLR trip via most intermediate ports - be it SIN (most preferred), BKK, KUL, HKG, and once even AUH. Once I even paid a "surcharge" of ~$200 cash as well as a worse connection, just so I could fly the SQ A380 ex-MEL.
As time passed, I'd while away any spare time by jumping on Flight Radar/FlightAware and search up airlines/routes that flew the A380 and would search what cities they'd connect. Then follow this up with watching take-off/landing videos of the giant beasts. It's an engineering marvel how such a massive tube of steel, carbon fibre and fuel can take-off/land with such grace.
The obsession with the A380 of course came about by the desire of premium travel (as I'm sure would be the reason as most in this thread). The sheer size and space available in the A380 allows airlines to really go all-out when designing their premium cabins, and SQ, for example, has really used the size of the A380 well in this regard.
It will be a sad day indeed when the last A380 touches down, as premium travel just won't be the same again. Sure there'll be other aircraft with suites/apartments/mansions on board, but they'll never be able to replace the A380. Loved by avgeeks, hated by bean counters.
Than that super WOW feeling I experienced when SQ first made R Savers available - I grew to love old R on SQ 380 like it was my second home - just love it - would readily trade the hideous new R on 380 for old R any day.
Yes I agree, have flown the old R on SQ218 almost a month ago exactly, and I can see why you'd call it your second home. I'm hoping to do the same, though on hops to LHR/FRA/JFK as opposed to your hops to PEK/PVG