It's odd really. Like many of you I have the pets that came with the Imperial Edition along with those that came as beta tester rewards, yet not a one has ever left the bank on either server. Frankly, I didn't get the appeal. Plus I - sorry Val - tend to avoid Sorcerers who use their summoned pets. I call them Thalidomide babies as they're just so damned ugly. And they get in the way. Many a time I've logged and taken a break when a Sorcerer was questing nearby.
Yet when I did that quest to recover the artifacts from Azura's Shrine, and used that summon Scamp charm....well...I must say I got sort of used to having one of those miserable creatures on my side for a change. Plus I sort of....well....I sort of missed it when it was gone. Thus I kind of...somewhat understood the appeal of these ESO pets...a wee bit.