I used to love making Hummus at my last job.
I don't know any fancy recipes but I would allways add a little more tahini and garlic then the recipe asks for.
Gives the flavor alittle more punch.
If I'm reading your recipe correctly it looks like you don't use enough Tahini.
If you are saying 2 cans of chick peas as in...
Than you are gonna need about 1 and 1/2 cups of tahini. Tahini IS the flavor of the hummus.