It'll be sad if Pora-PRP don't get in, but I don't regret having voted for them.
Yushchenko and Yulia had so much public support in 2004 - and they wiped their asses on it. Since Yushchenko became president, he's made too many counterproductive steps, which at some point became impossible to ignore and seemed to work for the benefit of Yanukovych - or at least let Yanukovych sit back and relax and watch how Yushchenko was killing his high rankings without much external help.
Helping Yushchenko help Yanukovych didn't seem like a good idea. Helping someone with good record and at the same time relatively new to all this circus seemed worth trying.
In 1999, everyone voted for Kuchma because they were afraid of Symonenko, the Communist leader. Everyone, including Western Ukraine. Later Kuchma turned from lesser evil into the greatest evil, and millions of people came to really regret their choice.
In the States in 2000, instead of blaming half the country that voted for Bush, many people blamed those who voted for Nader for letting Bush win.