I do wish they would return to pre pandemic levels of Domestics between LGW and EDI/GLA. There's definitely routes I would try and would also really like to try the F Lounge.

As an Avgeek I love the bustle and variety of planes at LHR. T5 works well when you have status and whenever possible flights from T3 are a delight.

OT slightly but LCY is my favourite LON BA airport, that may change with the proposed changes to the BACF fleet. A joy to connect at and they've never lost my bags. Lounge access is irrelevant there given how quickly you're from kerb to gate.