HI I am a sleepy xbhp. I am with Xbhp since 2009. I am coming back to India and like buy a bicycle.
The main motive of riding is going to fitness and riding around.
I need your help and suggestion to select a bicycle for me and increasing my knowledge.

Which brakes are better V brakes or disc brakes?
Which wheels are better normal steel wheels or alloy wheels?
Which bike is better with front suspension or without?

I am 25 and weight 78 Kgs height 5'10.
I will be riding in city only. The road conditions are not good in city which one I should go for road bikes or mountain bikes or hybrid bikes?
My budget is around 10k to 15K.