Petrolhead's experience is very interesting. Possibly off topic, but as a home brewer I've been following a parallel journey in trying to replicate the wonderful beer styles out there. As with many home brewers I was experiencing the familiar "oh that lost taste, if only Pilsner Urquell - for example - could taste as wonderful as it did in the 1970s. "
I've come to the conclusion that when many of us home brewers go berserk with malts and hops, different yeasts etc we often try to over egg the pudding and make very hoppy beers, or very strong beers at 8% ABV which flood the palate. After a while the commercial brands that we grew up on taste like cat's pee.
Good example: my brewhouse has been mothballed for around 2 months now as we are moving house and the home made supply finally ran out a few weeks ago, so I had to buy commercial. My beer of choice at the moment is Henninger German Pils which a major liquor chain imports and you can buy a "slab" of 24 bottles for AUD 30 as opposed to AUD 40-50 for many domestic brands such as XXXX or Tooheys and it's a proper German beer brewed to the Reinheitsgebot purity law.
Now when I was brewing - along with many others - I tended put Henninger etc into the "megaswill" class, oh how sad that they have denatured a once fine brew, I remember drinking Henninger in Greece many years ago and it was a fine drop.
To my amazement, when I supped the first bottle, I was back in Greece again - my hair was black once more and my beard luxurious - and no belly

- the bitterness and malt aroma and hop fragrance seemed just fine, after a while away from my own beers my tastebuds and palate seems to have "recalibrated" .
I wonder if there's a bit of this in the curry world as well, maybe give up curry for a couple of months then try a Takeaway - not that such a thing is realistically going to happen ;D