- 17 Sep 12, 17:13#320981Totally depends on the context. If it's relevant and useful then yes, if it's not relevant and not useful then no...
Sure I'll use them if it's work related (though they're not in my email signature as someone mentioned earlier!

), for things such as submitting papers for peer review, grant applications etc.
Likewise if I'm on one of the two or three forums I post on and people are talking bollox about one of the areas I'm qualified / experienced in then I'll mention that I'm qualified / experienced in that area - because it's relevant. One of those areas I frequently see people posting about is law - many people seem to think they're armchair lawyers, or see fit to completely demean the legal industry, which really annoys me.
Other than things like that, why would you ever really need to mention your qualifications?

Favourite racing series: F1, Indycar, NASCAR, GP2, F3, Formula E, Trophee Andros, DTM, WTCC, BTCC, World Endurance... etc. etc.