These people express their opinions with confidence or at least with the appearance of confidence. They can be good at bluffing. Pride can be the biggest impeding to learning as it can be so hard to the Mercury in Leo person to admit their ignorance in the first place. Learning often requires starting from the bottom and this may not come so easily to this potentially know-it-all type.
There can be an ability to express information with color, fun and drama, so they can be great story tellers or people to have at party! An audience can bring out the orator and dinner party speaker. They have usually a very good sense of humor!
Typically while being more subjective in their views, these people are also very loyal and do not speak ill of their friends. Friendships will be with those of lively and playful personalities or even local popular figures.