(CdM) Linked to a particular culture? - Erm ... N0 - well maybe a small 'yes' but am not sure if that's helpful. Am struggling with the culture word to be honest.
(NotJohn) Medical condition/syndrome? - NO
(Software) Pleasure? - NO.
(Tuj) Location location? - NO
(Quendalon) Prefixed word? - NO
(Phil) Pedantry? - NO but *appreciative sounds can be heard in the audience*

(Quendalon) Religion-related? Could be - but not necessarily.

(Dujon) An attitude? - YES it is. And more. *audience has perked up* .
(Quendalon) Philosophical? - if you scratch the surface, the AOTC might be ascribed to various philosophies - so I'd say more Yes than No. However, this could apply to most attitudes so my answer may not be too helpful.
(NotJohn) Language? - NO

*contemplating an earlier question by Quendalon regarding mathematics - perhaps I should have replied 'Yes, but only obliquely'*

(NotJohn) Perfectionism? - NO *audience remains perky*

(Phil) -ism? - NO - although all three letters are contained within but not necessarily in the same order :)

(Tuj) Promise? - NO
(Quendalon) A noun? YES indeed it is.

(Software) Perfect? - NO more than when Phil asked the same on 28th March :)

I chose this 'P' word because it has a succinct definition. A human trait, which we have established, which can easily be arrived at given some judicious questioning.
However, this word has another use which necessitates a change to a couple of my replies. Mathematical/Scientific/Philosophical links are rather stronger if this path to the solution is chosen.

... a little research tells me that this alternative use of my P word is the crux of a Subject for guessing in this very game back in 2005.