You had a very refined palate for an 8-year-old.
Tilquin is awesome, the Plum version is also excellent. It has been so long since I've had Girardin Black or White Label that I don't think I can comment on it, but I do remember thinking Black Label was amazing at the time. This was definitely back in pre-2009 as well.
The before time, when Cantillon just sat on shelves. And 18 dollars was expensive for a 750 of any beer.
The last gueuze excluding Cuvee Rene that I bought off a shelf or out of a cooler was 3F Golden Blend and Cantillon Cuvee des Champions at Pizza Paradiso in DC. 3F Scharbeekse Kriek around the same time at House about 4 years ago.
The most recent I bought was FouFoune and Mamouche at Vintage Estates and even that was 3 years ago I think. Did not care for Mamouche. FouFoune was good, but not up to the caliber of St. Lamvinus for me.
Stuff like 3F Framboos is of course great, but I've always found myself more drawn to the basic unaltered gueuze or even straight lambic like Iris or Doesjel (which I think is technically an uncarbed gueuze) more than the fruited stuff.
****, now that I've written them all down I've had a lot of different lambic/gueuze. Name dropping.
If I had to pick a flat out favorite, I'd go with Drie Fonteinen Oude Gueuze.