Massive Furby lover and collector here! They are my other main love besides ponies, and the number of furballs I share my home with is 3-digit
(I wish I had a pic, it's been on my to-do list for years, but they are all over in different places of the flat, and the thought of bringing them together always seems too difficult)
As for customising, I have mixed feelings about it... On one hand, I did see wonderful customs (haven't actually done any myself yet). On the other hand, the customising bug seems to be spreading, and I am starting to see rarer versions and MIB Furbs being customised too. Gen 1 Furbies are now over 20 years old, and since they are electronic, I suspect a lot more of them have ended up in landfills, having been thrown out once they stopped working, than ponies. So I'm starting to worry a little about the rarer Furbs becoming harder and harder to find. I know this topic is sensitive in the pony collecting community too, and I don't want to open a can of worms here, you haven't made the thread with that purpose
I am not against customising Furbs, and I do have plans of trying it out myself (I've had an idea and a Furb for about 10 years now, but never got around...), however, I really wish/hope customisers will become a bit more conscious and start applying more thought before they chuck a Furb in good condition/with a rare fur pattern, and, just like with ponies, rather aim to obtain bait Furbies (fur condition-wise) for this purpose.