Because the others suck balls 100% more than Estelle could ever possibly suck balls (and she could probably suck a lot of balls).
Exactly. The other housemates are fucking horrible (not necessarily as people because I see good in all of them, but so much of their behaviour is just terrible). Estelle is very mature for someone her age in the way she responds to criticism and negative attention. She does her best to treat other people with kindness regardless of how they treat her. I admire her for how much self control she has.
I was once like you, OP; I thought she was a bit of a bore and a sourpuss at the start, but in the weeks that followed, she slowly unravelled and showed me that she was a kind, decent, interesting and mature human being. I don't make apologies for people who can't see it. You either see it or you don't. She's got incredible self control both mentally and physically and she has handled herself better than I could have under the same circumstances; I admire her for that. I see the prize money as a reward and compared to the other house mates, she's the only person I would feel comfortable having their behaviour rewarded (I'd also be happy to see Sam or Layla win; Sam is a nice guy, but he hasn't generated enough story lines or demonstrated much strength of character to warrant the win and Layla is a bit of a pushover - she isn't very consistent and seems to just sit back idly by to let the hivemind dictate everything. She seems to lack the will to speak her own mind, but she's overall a good person despite this).
I've also found her quite entertaining, particularly in recent weeks, but I don't expect anybody to see it like I do; we're all different people with different perceptions, so there's no point arguing to convince anyone otherwise. Loud, obnoxious behaviour does not always equate to an interesting character or entertainment anyway; I think that Estelle has a depth of character that she keeps hidden to people that don't know her under the superficial "skater girl hippie" veneer, which would make her a very fascinating person to get to know.
And I think she is attractive. Don't be a Zoe and try to deny that, because she is. I don't understand the argument that "She's not special, she's got nothing on *insert ridiculously attractive celebrity here*. Why do people find her attractive?" like that somehow makes her any less attractive just because there are plenty of girls who are just as attractive as her. She's nice looking, she takes care of her body and she's got a pretty attractive personality too. She's an attractive person to many people, whether you see it or not.
That's why I like her and would be satisfied to see her win. It doesn't really matter who wins though, because these housemates will all be erased from our memories by the time this week is up.