I love bootlegs. The history of piracy and copyright-defiance in general really fascinates me, but I have a really specific taste when it comes to boots. For one thing, I'm not big on the 90s-era Dendy-esque "GRAND DAD MARIO" kinda games, and anything that was made post-2000 doesn't interest me at all (seeing Mario Sunshine art on a famiclone cart using the cheapest, flimsiest yellow plastic known to man gives me some sort of visceral reaction), but if it's old and odd, chances are I'm interested in it, especially if that means original artwork.
When it comes to almost 1:1 recreations of legit games I honestly don't mind it at all. I own a CIB bootleg of Shadow Dancer for the Mega Drive that looks almost 100% exact but is missing the Sega logo and some other text and symbols on the cover (oddly, the removal of these bits means you can see more of the artwork than on a legitimate copy, making me wonder if they just "filled in" the originally-obscured areas themselves or if they also possessed a clean copy of the cover artwork). I'd gladly own any number of retro games in a similar condition, even if they were counterfeit, just because it intrigues me. In the same breath tho I have zero interest in modern Chinese bootlegs. Legit or fake, it still has to be retro.
On that same note, I sometimes find the bootleg stuff cooler than the official, especially in the case of some famiclone carts, like the Whirlwind Manu version of Lupin III. Sure, it looks largely identical, but it's a counterfeit version of a game about a thief. Something about that is just inherently cooler.