Interesting question Mr K and my answer is that if I had the choice and the setting, I'd always pick braces (Thurston's) and always buttoned, not clipped. The comfort is unparalleled and your trousers just fall right, which I find they do not with any other method, since the trousers then fall from the sides rather than hang from the front and back, if that makes sense. Unfortunately the setting usually does not allow.Another 'how do you do it?' question.
Back in the day we supported our trousers with narrow braces when in casual mode and our more formal, bespoke trou were 'self-supporting' using side adjusters in different designs.
Today I wear belts with more casual trousers and with the odd suit, but increasingly it is braces / suspenders with suits and more formal trousers. Mrs K just bought me these red jobs for Valentine's.
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Which method(s) do you favour?
A chap I knew moved recently to our tropics and I saw him three times in the first year. The first time, he stuck by his old school habit of double breasted suit (a thick pinstriped worsted, naturally), tie and braces. The next two, the weather had managed to shed him of his coat and tie, although the braces bravely remained as a vestige of his former self in more civilised climes. Thereafter it was side loops and belts. What then of the Old World "spine", well, we live in an age of comfort, trouser line be damned... perhaps that explains the popularity of the painted on look, no problem with keeping a straight crease there.