Well, our British cousins would likely object to gas tank nozzles being on the passenger side of their vehicles. 
Yes, MGs or at least the MGA I used to drive.
And my Porsche 911 had this arrangement, too. The fuel fill was high on the left (driver’s side) front fender, so you could easily watch as it was being filled. (I live in NJ where one of the few advantages is that all gas is still full serve.)
Re: the OP, I agree this is a pain. I travel for business and drive a lot of rental cars, and when it’s time to fill up, I ALWAYS seem to guess wrong as to which side the cap is on.
The really old VW beetles had the filler under the trunk lid. I know because my father had a '57 and that’s where his was.
Some inattentive gas pump jockey spilled about a quart of gas in that trunk and the Old Man went ballistic.
BTW, some of the old cars with center-fill gas tanks had the filler behind a retractible panel (e.g. the 1961 Cadillac), some had an exposed cap ( e.g. the early Ford Falcon), but the worst had the filler behind a spring-loaded license plate holder that either snapped back too hard and made you spill the gas while inserting or removing the nozzle or lost tension and made you wire it up in order for the cops to see your license plate.