How rude 
Not at all - and no rudeness was intended - nor, indeed, would any likely be taken had you read the post literally as a civil question in the light of the number of fine players there are today rather than as an attempt to undermine the fact of your holding your view by being patronising about it.
Helene Grimaud has international stardom and plays at top venues with top orchestras. She is by no means not a decent pianist. 
A decent one, perhaps - but I thought that we were seeking out more than mere "decency" here. Lots of pianists have international stardom but it's by no means an absolute guarantee of greatness or even ability.
I picked her because she is highly inteligent and loves and adores what she does and is technically masterful. Have you not watched her documentary entitled Living with Wolves? That is an insight into her life as a concert pianist, how she got there and what she feels about playing and she has been nominated for a grammy. To say "is that the best you can come up with" is a bit disrespectful and shows you do not let people decide for themselves who they like.
I have seen it, yes - and I am not seeking to doubt her sincerity (although I remain to be convinced that the documentary really tells us anything much about her pianism or even her pianistic life). As I indicated, no disrespect is intended, either towards you or HG. It's not for me to "decide" what anyone else thinks, but that doesn't mean I'm not entitled to question it, which is all that I did - no more, no less...
You obviously do not like her and thats fair enough, but she is an international concert pianist who goes all over the world. Do you think if she was not that good she would be doing that? I think not. I dont know where you are from, but Helene has played at the Proms in London and only good quality musicians get to play at the Proms.
I do not "dislike" her, nor did I suggest that I do but, as I stated above, the fact that she has an international career is of itself no absolute indicator of her gifts; if it were, then some far finer pianists that she is would have equally starry careers - but life doesn't work that way, nor did it do so when Alkan was alive!
You have asked me why I picked her so now I want to ask you a question.. why do you not like her?
I've already answered that one above by clarifying that I don't dislike her.
It doesnt matter to me one way or the other
Then why do you ask?(!)...
because she has plenty of fans of which you are obviously not one but I am simply curious to know what is it about Helene that puts you off?
It's not even that; it's just like, as with Valentina Lisitsa, nothing that I've head her play really excites me, engages me, interests me, has me hooked - and there are other pianists who
can do that.
Do you think she uses her looks to get to where she is today?
I don't know, but I doubt it - but then I'm the wrong person to ask, perhaps, because I don't find her especially good looking either.
I think her talent is what got her to where she is. I have met her and I do not think she is the type to use her looks to further her career. If that was the case then half the people in the audience would be men drooling over her and not the slightest bit interest in her playing and for what its worth, I am a female and go to listen to her as a pianist not to sit and gorpe at her looks (anyway if I did I would be a lesbian and I am not that)
As I've indicated, I've no especialy reason to assume that she's sought to use her appearance to further her career; the prospect that as many as half of the members of the audience that she would expect to get at the Proms, for example, "would be men drooling over her" strikes me as frankly absurd for more than one reason!
Best,
Alistair