I don't like conservative policies - I believe primarily in free choice, equal rights to all men and women, democracy and that all people should get a say in how their country is run. I do NOT believe in hate at all - and therefore I do not believe in discrimination of any kind. I am also anti-materialist, and an anarcho-syndicalist.
Conservatives are often very black-and-white, idealist in the way things should be, traditional in their beliefs, and often religious. I don't have a problem with religion generally, but when it becomes involved in politics things become biased and corrupt. Keep the state secular - it keeps things balanced.
The Republican Party (generally) believes in "the right to bear arms"; denying the rights of same-sex couples to marry, or even be legally recognised; strict constitutionalism, capital punishment, and a free market.
A free market leads to a hierarchal society, divided by financial status. This means those with less money have less rights, because in a "free market" everything must be bought. If you don't have money, you don't have the right to own anything. So in this system, society becomes materialistic, and money-oriented. And as an anti-materialist, i don't believe in that.
Capital punishment = legally approved vengeance. I don't believe in vengeance; i don't believe it does any good
Strict constitutionalism means two things I am against - the first is lack of democracy. If the government adheres strictly to the constitution, the government can't make independent decisions on some things, so the people's choice in how the country is run (democracy) is not fully recognised. Secondly, and more importantly, a constitution which was written in the 18th century is going to be less and less relevant over time (it's relevance is questionable even today) - strict adherence allows no room for changes in social values to keep up with changes in society.
Denying the rights of legally recognised same-sex couples infringes on my personal beliefs of free choice and equal rights. Homosexuals should have the same rights as heterosexuals, and i don't see how there is any justification on otherwise. Homosexuals should have the right to choose to marry or not, the same as heterosexuals. Now, the argument on "marriage" is tough, personally I don't see why the definition of "marriage" - being strictly between a man and a woman - should be strictly adhered to when it denies the rights and freedoms of some individuals. But to keep it simple, there is absolutely no reason a government should deny a homosexual couple at LEAST legal recognition as a couple, such as a 'civil union', even if it is not the Christian "marriage" ritual.
The "right to bear arms" is a constitutional right in the US. Now why this is a 'right' and other more important rights are denied to some people I can't imagine. Guns are made for killing - simple as that. There is no way around it. Allowing, and almost condoning the possession of firearms is practically encouraging murder. Sure, there are laws against that, but if you arrest someone who's just shot someone else, at the end of the day, someone still died. Punishing murderers is ineffective, because people still die. You can't rely on justice and laws to prevent murder when people are legally allowed to hold a firearm.
The other aspect is religion - I believe in peoples right to believe, so I support religious practices. But I don't believe in preaching; religious practices and beliefs are for the individual only. When a politicians' religious values are majorly involved in politics, it creates an unbalance and unnecessary complication in the parliament. Not all people will agree on one religion, so no on in power should express their religious beliefs as part of their policies. Keeping a secular state keeps things simple, realistic, down to earth and allows for focussing on the issues immediately at hand as quickly and as effectively as possible
tl;dr: I don't like conservatives, therefore I don't like Republicans.
EDIT: In regards to your poll options, I couldn't accurately pick any. I chose "Republicans are racist/homophobic/whatever". I wouldn't ever say that, but there was no option with basically said "I don't like Republicans". I don't hate Republicans, but I definitely dislike Republican policies