Ascension Island was (arguably) the Ársehole of the Universe'-
No chance, that was and still is . . . LAGOS.
As for Diego Garcia, I remember going through there in 1976, we had to steal the sheets off the beds in the far end of the Nissen hut. That was fine until the Yank P3 crew returned from a sortie at about 0300 - oops. Skipper slept on the beach and was eaten alive by sand flies et al (obviously they weren't fussy about what they ate (Bullen-beef))
We'd been drinking with the Master At Arms (I think nick-named the Sherrif) who was Royal Navy (I think) at some 'pub' with a rattan roof. Goodbye brains.
I think, on balance, ASI was FAR better. Bacardi was 5p a double and a Coke 50p. We used to lay on the cinder path on the way back to Tristar village and look for satellites in that FABULOUS sky.
Nostalgia is definitely NOT what it used to be.