Hair: Which shade do I suit best? Help! :)

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Hey beauties!! I need your opinion. I've had my extensions redone, and I'm not sure if I'm super keen on the colour. I've always been blonde, but I've been experimenting with shades and tones recently (I know, I'm crazy like that) and I don't know how much I like my current colour. My hairdresser is lovely, and has offered to change the colour complimentarily, but I just don't knooow!
Which shade do you think I suit best?? :(
Warning: lots of mug shots haha.
This is my hair at it's lightest, kind of white blonde:I don't think I want my hair back as light as this, too blonde? What do you think?
And here's my hair at the shade I had it for a long time:It's a kind of baby blonde, and I do like this shade, I think I'd be happy to go back to this.
Then I went a bit crazy and asked for my hair to be completely toned down, with warm lowlights. And I loooved it. But while my extensions obviously stayed that colour, my natural hair faded and quickly went back to light blonde. It looked pretty bad so I had to get my whole colour redone lighter. :(
So I got my hair coloured blonder this time, but tried to keep some of the warmth. I think I just loved my colour so much last time that I'm really not sold on this - do my roots look a bit yellow??Sorry for the poor photos, I was at my boyfriend's grad ball last night and am not in a fit state to photograph myself  so these are drunken photos from last night!! =p
What do you think?? Should I get it toned down more and go darker? What shade do you think I suit best? White blonde, baby blonde, golden blonde or my current shade? HELP! :(Let me know!
~ Lauren ♥