My current predicament is a soft landing to Bronze, and primarily short haul Europe - but very frequently (Silver again soon). So I've got Priority Pass.
BEST so far: Rome PP lounge next to BAs - considerably larger and better product than BAs. Some may argue that's as it should be for a paid lounge. Fabulous shower rooms included. Cook to order kitchen plus buffet Plenty of space and views.
WORST so far: LHR T5. Very sadly as its my home airport. Pokey, very crowded, very limited food offer. Pop in, grab a bite, sit outside in the terminal.
Would be interested in views on best PP lounge on the BA network?