Absolutely INFP, in my opinion. Here are some quotes and passages that I think make the case for her INFP-ness very well:
Although 'under-confident', she was a clever child ('a bit of a swot') and had a 'fertile imagination'. She would watch the television wondering if she could climb inside it. Other times she would play around and dress up, watching movies and pretending she was in them. 'I remember ...; when The French Lieutenant's Woman came out,' says Bonham Carter. 'I would pretend to be the French lieutenant's woman. I was always a romantic. I still am, actually.'
It took me so many years to move out. I'm definitely a bit of a Peter Pan, reluctant to grow up. It all seemed really nice at home-why change it? Part of me would prefer not to have any responsibility whatsoever.
[talking about distaste with watching herself on screen] 'It's not false modesty,' insists Bonham Carter. 'I hated what I looked like. I did look, as somebody said, like a bloated chipmunk! I had a lot of criticism, and I've always been more aware of the criticism than the praise.'
'For me, acting is about getting away from myself. So to look at myself is the last thing I want.'
Q: Is she shy?
A: 'Yes, I am,' she says, unexpectedly. 'And I love to criticise myself. Well, I don't love it, but you know what I mean.'
ENFP through and through, she has that eccentric bohemian outgoing personality...she puts zillions on layers of clothing and jewellery on because she just loves everything. She absolutely bounces off Jonathan Ross in interviews, long time live in partner (not yet married). etc this is a good watch.
On second watch I do see some INFP traits in there....hmmmm
"We knew he was someone who had a tragic flaw, that's where his greatness came from"