I've not read all 11 pages, but anyone who doesn't answer London Euston is objectively wrong.
I've never liked Euston. I remember being there 3 or 4 years ago when you still had to pay for the toilets.
The floor of the gents were flooded, half the cubicles were out of order. What was I paying 30p for?
Once I bought a burger from Burger King there and I'm sure it was more expensive than a Burger King on a normal high street.
The main concourse, the outside in front of the concourse - just yuk! And then you go to the underground which is even more depressing with massive queues for the ticket machines.
It's never been a good place to start or end trip to London. Especially to end a trip, you just want to get the hell out of there!