Yup, I'm 'hooked' too. The Grado's simply need an arm that will 'damp' the cartridge a bit...helps with tracking and yes, one needs to set the VTF up a bit more than Grado suggests. VTA maybe a bit 'tail down'. The lack of shielding can cause hum on some 'tables. They're not a universal cartridge like the Dynavector's.
There is simply no cartridge I've ever heard that gets the midrange as 'right'. That's where the music lives, after all. Some would call Grado's 'colored'. Well, maybe so. I guess my ears hear midrange frequencies as 'important'.
They are said to be 'warm'. Yeah, probably. (Better that than 'dry'.) The higher up the line you go, the more neutral they are. But, the midrange is unequaled in my experience.
The much talked about 'Longhorn' mod (TheChairGuy) really does work in certain arms. If your arm has adjustable damping, that's all most will need. YMMV...
WEEZ