I generally listen to melody songs. And, I am more into the male singers. And, there is a variety of voices and styles there. Like Armaan sounds soft and Atif sounds a bit rough and imperfect, yet sweet. Now, Bollywood mostly tends to deal with melody. So, if you're looking for rock/metal, I'll tell you that it really isn't a big part of our music culture. You can find such stuff only at the indie/band level that almost never gets commercialised. I can find umpteen Hindi rock bands here but then, no one in Bollywood produces such stuff. However, there are some listeners of these kinds of music in the metros here and there.
Recently, rap music (called desi rap too sometimes) has emerged as a parallel genre of music especially in the Punjab region. And now, it has a place for itself in Bollywood too. Also, there are many dance numbers and peppy numbers for dancing. Most of the songs in Bollywood are of that genre. Female vocalists are actually doing many kinds of stuff today. But, those don't seem to work for me. But, you could search them on youtube.
I am into modern melody myself.
At first, the kind of songs that I post could feel very different to what you hear. But, It's detailed, granular, and quite nuanced. It's to do with a spectrum of tones that involves more than the Octave itself (and includes it). We tend to permute and combine upto 12 different semitones on the Hindustani scale on different kinds of beats again (notice the kinds of permutations finally possible). And, all this to help express the beautiful human heart. So, that's a lot of content to tickle, and ofcourse entertain your right brain.
Enjoy