Hey ImNot,
I wonder do you swerve from intellectual to emotional in a big way? Something similar to Moon in Gemini? But, judging from how you express yourself here, I'd say mostly sticking to intellectualism.
In most house systems, my Moon in the 3rd of Virgo. Left brain, right brain, left...
Hello, Jove. How are you doing?
I was about to finish my reply to this post when I made an err, and as a result the whole thing was expunged. Here are the brass tacks:
I had wrote something to the effect of there not being a conflict between the Moon & Mercury, as with this conjunction both are fruitfully combined rather than pitted as contending forces. Naturally my expression here is not identical to my expression in human form. We are merely shadows of ourselves when writing here, as few write as they speak. At friendly close quarters, it would be impracticable to speak with the formality that is of use writing here.
Those with the Moon in Gemini I have known have not had that burden of oscillation between emotion and intellect, their caprice being for the most part in the sphere of the intellect. Actually, I do not know one with this moon who is overly emotional. Though that reflects more my narrow exposure than an omnipresent fact of being.
By intellectualism do you mean only the use of the intellect, or is this some elect of philosophical persons? 0_o
In regard again to the Moon-Mercury conjunction, I still cannot think of any time in which I thought both forces were at odds.
I have many tensile aspects from Pluto, so although I am by norms in good humour, I can be dire in the loss of temper. And rage itself is an emotion, and not a part of the intellect per se. So I would say in the best possible scenario, a fruitful blending of both, or, in changing cases, either the extreme of intellect or the extreme of emotion. But when they do come as one, it is an harmonious union.
What I do notice of the conjunction is that it is difficult to speak purely out of emotion. Usually the speech is of the intellect oriented upon the emotion felt intensely, but before the time of articulation. In order to actually voice the emotion that must perforce be lent voice, there must be some dissociation from the emotion, if temporarily, to actually impart an accurate picture of its state before returning. I am afraid this might be slightly obscure. To illustrate, it is like being confronted with an alien language. It is at once incomprehensible, but if we move away from the language to a source of translation- a dictionary, say - it becomes clear for us, and then we return to the original language in clear terms. Some people mistake that for insincerity. When in the thrall of an intense emotion, rage or sorrow and otherwise, a stone weighs down the clear-speaking tongue, so the language of the intellect becomes obsolete, a mutual exclusion in a way.
Does the Moon, then, affect right- or left-brainedness?
And I sometimes wonder if the Moon-Mercury conjunction played any part in my being left-handed...
I would think that the third house accentuates the natural qualities of your Moon in Virgo.
Somehow I am not surprised you have a Leo moon - and that ties in with your question! 
. Also, I think the Moon would also be contra-parallel the Sun...