Joss Whedon. Hoooo boy...
So when I was a teenager, I thought Joss Whedon was the coolest. Buffy was my favourite show, and I loved Firefly too, and I just thought the man was a genius with his mixture of soap opera drama, witty quipping characters and progressive themes, like including lesbians in his stories, or giving female characters agency; plus he liked to feature people I could relate to; weird or shy geeky girls got to be heroes in Whedon's stuff and I loved that!
It'd be a lie to say I wasn't influenced by Whedon's writing. The way he mixes comedy into serious stories, the nerdy references, his love of ensemble casts, the way he uses Fantasy stuff as a metaphor for very relatable problems or experiences, the prominence of geeky, down-to-earth female characters...
But it's hard to say I can enjoy Whedon's work as uncritically as I used to. A lot of the stuff that seemed progressive is often, when viewed as part of a wider canon of work, a weird fixation, bordering on fetishisation of young attractive femme-presenting bisexual white women with slightly geeky interests, and making them powerful, but then also making them vulnerable in a weird, uncomfortable way, or putting them on pedestals where everyone worships and adores them in a way that kind of passes through empowering and starts to feel creepy and dehumanising. Plus I just started to realise he can't write a wide variety of characters. He has a stable of archetypes he falls back on. A lot of people praised "Astonishing X-men" for "making Cyclops likeable", but all he really did was write Cyclops as Mal from Firefly, which isn't really making Cyclops likeable, it's just making Cyclops into a different character who people already liked.
So I wouldn't call myself a "fan" these days... but the influence is still there baked in my work. I still even use the advice he gave on the commentary for Firefly of introducing characters by having their first line or action be as emblematic of what they're about as possible.