hi there teezee!
anyway, on topic. There are many poison types I would love to transform too, barring Garbodor. I love to transform to Nidoking for sheer awesomeness. To crobat for the power of stealth and speed and flight. For Gengar for a ghsotly experience. To Scolipede for sheer weight.
But srsly, i would go with Crobat.