Leonard Nimoy, Mark Lenard and Tim Russ gave really good performances of what I prefer to think of as The Vulcan Way. After these guys, STAR TREK seemed to like the Vulcan look, on girls, especially, but resented their disposition for being dispassionate. So, they always found a reason to get Vulcans we knew or wanted to like, to act emotional. The most blanketed version was Pon Farr, of course.
This was followed, closely, by having the Kishara become "lost," supposedly, even though - OK? - even THOUGH Surak "lived" right in their midst, within the Syranite Leader, himself. T'Pol finds herself drug-addicted. On TNG, Mark Lenard's Sarek got Vulcan Alzheimer's, so he got to channel his inner Richard III, there.
In TOS, Spock often found himself in situations so dramatic that he'd let some emotion loose. Like that time when alien plant spores made him loose, enough, to where he could engage in PDA's with his old flame, uninhibited. Why not just have Romulan citizens of the Federation, and stop stripping Vulcans of their veneer of discipline and self-control, to compensate for lack of talent, by these shitty-assed writers?