Since Tuesday night and this year's grand Big Brother entrance, we've seen our new housemates rock into their roles in their own individual ways. Some of them dived into proceedings with merry abandon, caring little about repercussions, whilst others slinked in on tippy-toes and made the lightest of marks with a smattering of polite smalltalk and not much else. The former are probably hoping to make an instant, positive impression whilst the latter might well be playing the long game. So who are the introverts and who are so extravert their personalities are already branded on our consciousnesses like an ill-considered tattoo procured on a drunken holiday on a party-island?

In terms of low-key introductions, despite her ordeal of nominating three complete strangers on opening night, Deana's probably keeping her own counsel the most. Where others have keenly thrown their neuroses onto the table without a care from the off, Deana's held everything back, only really speaking up when comforting Lydia (more of her later) and when slightly feebly but endearingly telling the girls she's worried she's not fitting in. Adam's immediately lodged himself into the nice, approachable guy slot whilst Sara and Scott are, perhaps wisely, taking their time to find their feet.

Somewhere in the middle of the spectrum we have Luke S (not too shy when it comes to ripping his shirt off), Shievonne (a fiery customer and full of laughs), Ashleigh (settled down now after a frenzied opening night) and Conor (who's outgoing but simultaneously the type of chap you feel you've met a million times before). And there's Benedict, whose personality is as loud as his temperament is prim and proper. His profile speaks volumes, but despite the zaniness of his CV, he's turning out to be quite a lovely chap. So far. Also lurking in the middle is Lauren whose single dramatic act – a truly spectacular mid-air somersault – has prompted the attentions of Luke S and Arron. The 'Lauren Sandwich' of yesterday means she can no longer qualify as low key.

And then there are the all-guns blazing crew, firing in without aiming and making waves after only three nights. Victoria's reaction to her nomination might fairly be considered slightly over the top, and she's come out with quite a few strange outbursts here and there. There's bailiff Chris, who's wasting no time in stirring things up, speaking behind peoples backs and playing the giddy goat at all times. There's Arron, who may or may not be a champion kick-boxer and confused everyone by assuming the role of champagne butler as they all made their way in, and there's Caroline, who simply can't be anything other than extravert with that cartoon personality she seems to inhabit. And finally there's Lydia, who seems to have left her self-awareness in her suitcase.

Hands up who'd even heard of Andy Scott-Lee before she went in?

And aside from Luke A, that's the whole of the spectrum covered. The chef from Flintshire merits a special mention, because he managed that very tricky proposition of offering his housemates a revelation like an expert negotiator. Doing the rounds and making sure everyone had any questions they might have answered before he fully committed to being part of the group, Luke A couldn't avoid giving us some high profile TV moments over the past couple of nights, but he managed to do it in a very subtle, low key way that seems to have won everyone's respect and friendship in the early stages of the game.