he is my ♛ but he does not command my heart

He was as tall as a young tree, lithe, immensely strong, able swiftly to draw a great war-bow and shoot down a Nazgûl, endowed with the tremendous vitality of Elvish bodies, so hard and resistant to hurt that he went only in light shoes over rock or through snow, the most tireless of all the Fellowship.

So this means that the Sylvan elves (plus Thranduil and Legolas by extension) have mannerisms and phrases with a distinct mannish flair rather than a traditionally elvish one since that is the culture they would be most influenced by. (Which in my HC means that ways of speaking are much more blunt and straightforward. They are also more physical in showing their affection towards others)

So please imagine elves from Rivendell and Lothlorien visiting the newly healed Greenwood in the 4th Age and just getting the cultural shock of a lifetime:

Celeborn: Greetings, King Thranduil Oropherion, Kin of my kin. I see the sun has smiled upon the leaves of Eryn Lasgalen and the fruit shall be bountiful once more. *places his hand on his chest reverently*