Too Many Userpics

[weird_bird]

I used to have a paid account, with extra user pics, I can now have 15 and had about 130 odd uploaded, have reduced that to 65 but am still struggling to reduce it further, its quite nice to have such dilemmas to occupy my brain ;-)

Edited to add

Am now down to 20, I need to loose another 5, but am stumped, which user pics should I delete, if you can see them?