While I can't speak for Wengfook, and it may indeed have been that one that propted the post, it's a very widespread meme, and a lot of the time the Harry in question is actively opposed to the local evil/manipulative/overprotective Dumbledore. I think it's omre that the pheonix has been established in that setting as the symbol of absolute good, so having him turn into one (along with the useful travel and healing powers) goes to show that no matter how much and how violently Harry may row with the established order, he's still a good guy at heart.
Personally, I think if I was going to write an animagus Harry (Feh! As if I'd write any Potterfic) I'd have him turning into a pheasant to buck the trope (another impressive looking bird, but one which obeys the setting rule about nonmagical creatures) or a small terrier, probably a Yorkshire but without the long flowing hair of show-dog Yorkshires - small, dark-colored, relatively inconspicious, but essentially fearless (I have seen a yorkie chase a Golden Labrador around) and with a nasty bite if they've a mind to use it (I have a scar...) and able to knock a big man over with a good jump at the back of the knees (My brother in law is 6'4" and quite actively coaches his kids' football team). The only thing that doesn't fit so much is that Harry is kind of a loner and Yorkshires are decidely not.
- CDSERVO: Loook *deeeeply* into my eyes... Tell me, what do you see?
CROW: (hypnotized) A twisted man who wants to inflict his pain upon others.
Dr. Akagi will recover. Observe, Rei smiled. Shinji-kun, are these your clothes?
Ritsuko shot up like a spring loaded meerkat. What? Shinji-kun is naked?
See, Anata? Dr. Hentai is alive and well. - Innortal's _I Do_
--
"Anko, what you do in your free time is your own choice. Use it wisely. And if you do not use it wisely, make sure you thoroughly enjoy whatever unwise thing you are doing." - HymnOfRagnorok as Orochimaru at SpaceBattles
woot Med. Eng., verb, 1st & 3rd pers. prsnt. sg. know, knows
Personally, I think if I was going to write an animagus Harry (Feh! As if I'd write any Potterfic) I'd have him turning into a pheasant to buck the trope (another impressive looking bird, but one which obeys the setting rule about nonmagical creatures) or a small terrier, probably a Yorkshire but without the long flowing hair of show-dog Yorkshires - small, dark-colored, relatively inconspicious, but essentially fearless (I have seen a yorkie chase a Golden Labrador around) and with a nasty bite if they've a mind to use it (I have a scar...) and able to knock a big man over with a good jump at the back of the knees (My brother in law is 6'4" and quite actively coaches his kids' football team). The only thing that doesn't fit so much is that Harry is kind of a loner and Yorkshires are decidely not.
- CDSERVO: Loook *deeeeply* into my eyes... Tell me, what do you see?
CROW: (hypnotized) A twisted man who wants to inflict his pain upon others.
Dr. Akagi will recover. Observe, Rei smiled. Shinji-kun, are these your clothes?
Ritsuko shot up like a spring loaded meerkat. What? Shinji-kun is naked?
See, Anata? Dr. Hentai is alive and well. - Innortal's _I Do_
--
"Anko, what you do in your free time is your own choice. Use it wisely. And if you do not use it wisely, make sure you thoroughly enjoy whatever unwise thing you are doing." - HymnOfRagnorok as Orochimaru at SpaceBattles
woot Med. Eng., verb, 1st & 3rd pers. prsnt. sg. know, knows