Well... yes, I saw an interview with him a long time ago... yes, he certainly seems to have a lot of passion for film-making... but that doesn't make him a great director...
I'm surprised you rate Reservoir Dogs at the bottom of your list... it's the only film by Tarantino that I liked... ...when I watch a film, I look for a plot that keeps me engrossed... Reservoir Dogs had such a plot...
I guess it's a matter of varying tastes...