I like it if they're done well, which to me means if it's not overdone for the bodytype and don't look too much like they're unnaturally "bolted on". I'm usually way more into all natural types but there are exceptions as in rare cases I think big fake tits can improve the look.
Biggest exception for me being Jennifer Mendez, they're perhaps slightly too big now but she's gotten way hotter with the fakes than before when she was all natural. The big fakes if slightly too large they still really fit her wide hips bodytype.
On the more extreme end with the bimbofication-style it can be either really terrible or great depending on how well it was done. I'm not exactly a fan of the bimbo-style some girls are going for with way too much butt and lip-injections etc. But for example Kitana Montana still looks attractive to me, even more so than in her early scenes. Although I really hope she doesn't go any larger with the fake boobs and injections. She's now at the limit of what still looks hot to me.
Unfortunately the girls going for the real bimbofication style often go way over the top, like for example Tanya Virago has gone a bit too far for my taste...
But I usually all-natural is my preference and with most girls I'm often sad when they choose to get fake tits, like with Valerica Steele she had that small sexy bodytype down and really didn't need fake tits. I watch her for her crazy horny intensity and petite bodytype so the implants don't improve that look. Thankfully she didn't get gigantic ones though so I'll still watch her stuff.
I see Kenna James was already mentioned, definitely another case where I just don't understand why... the tall tinytits blonde look was exactly what made her popular and the implants didn't do her any favors. I do think the porn industry is to blame for pushing girls into getting implants when it's clearly not needed. It's like they are stuck in a mindset of 10-15 years ago that implants will get girls more jobs/views/fans.