Actually, that is a dangerous statement I made there.. about vulcan mentality being ideal.
If you ever see Gordan Ramsey's kitchen nightmares. It's a program where "Chef Gordan" fixes up failing restaurants. Or rather, fixes the owner and chef, of failing restaurants
You notice in all these cases, the chef there lacks passion.. (and lacks obsession with being a chef). He is totally *ambivalent*, lacking in feeling. And that totally demotivates him.
Gordan either sacks the chef.. or, manages to make the chef passionate again. Bringing back the passion.
And furthermore, even if one wants to be like Spock, the fact is that judaism requires that one be happy and sad.. Happy at simchas-joyous occassions(weddings e.t.c. ), and sad at prescribed times, like tisha b'av (mourning the destruction of the temple).