When I was younger I always thought females were better singers just because they had higher pitched voices, but as I got older I started liking more male singers and really liking their voices. Most female singers today all sing in the same way, with the same hip hop R&B sound. It's not really original.
I voted "not sure", but the real answer is neither. This kind of thing depends on a couple of things - the genre of music that they're singing, and whether or not they've had any vocal training in their life. Since the only real difference between male and female voices are the ranges they sing in, there are no other major factors to take into consideration. There is one advantage that men have over women and that's the ability for men to sing in the falsetto range, or even just the countertenor range. However, that is due to anatomy and not just talent (men have a bigger, more flexible larynx than women do).
Most singers you hear on the radio now are faking it with AutoTune now anyways.
TRIGGER WARNING *OMG SO RACIST! I tend to like black and Latina singers more because they have more range in their voices, they can have deep tones and still hit high notes, though I'm not a big fan of high notes. It's not all sweet, soft high voices like with many white women. That's not to say I don't enjoy white women singing, I love many of them. But there's more tone variety especially for black women.
Based on talent, it is difficult to say since I've seen many talented male singers and female singers. However, I prefer personally male singers.
I listen to a lot of songs with screaming in it, and men tend to have a voice more suited for the screaming. They also seem to have more grit generally in the voice which works for rock/metal genres. Being that is rock/metal, low bass kinds of noises are more prevalent and focused upon, which suits a male voice since males have lower ranges usually.
There are some female singers that I do like, but those female singers tend to have unusually low voices... which is probably why it works out fine.
You get the people like "Pierce the Veil" that really bother me, but overall, I believe men are best suited singing for the genres I listen to.
Not something that can be categorized by gender. Anyway there are people who are very good singers but sing lame songs, so I don't like anything they do even though they have a good, distinctive voice.
My favorite singers are almost all males. I tend to think women have stronger voices with more range but I find men's voices to be more interesting. People like randy Newman and Louis Armstrong are not your typical singers but I love listening to them. And then there's guys like Jeff Buckley. But Nina Simone, Bjork, and Amy Winehouse makes it a hard decision