In my opinion (please don't criticism my opinion as I am not asking everyone to agree to it), if you want to be called a professional singer you must have versatility in your voice. Singing the same type of songs (same genre, same mood, same feeling etc) is enough to call you a singer, but not enough to call you one of India's top and flourishing singers. Its not enough to even call you a professional singer. Versatility builds with experience. Some are naturally just so versatile. Others work their way to versatility. Look at our playback singers today.
Let's take Alka Yagnik ji (for those that don't already know, yes she is my all time favorite playback singer and an inspiration to my own singing) for example.
Here is one of her earlier songs:
http://www.youtube.com/watch?v=keOiXLL7V9g
Then you have a bit of faster beat songs from her:
http://www.youtube.com/watch?v=qa8M3cr6eko
http://www.youtube.com/watch?v=WtXUBrmJfz4
http://www.youtube.com/watch?v=-osWvzCMQ7s
Then you have the really high difficulty level songs:
http://www.youtube.com/watch?v=SRzoLVNgHoI
Then you have the classical touch in her voice:
http://www.youtube.com/watch?v=20LaU-N8Yy4&feature=PlayList&p=20032548E8018F09&playnext_from=PL&playnext=1&index=37
http://www.youtube.com/watch?v=0TjhOD_GtU8&feature=related
http://www.youtube.com/watch?v=q0rK7b-yJ1o&feature=related
Then of course you have the sad, slow songs from her where you can really connect with her voice:
http://www.youtube.com/watch?v=wb1AZoqDDs8
http://www.youtube.com/watch?v=nXYx6-NS6aM
Then you have the devotional songs that she has sung:
http://www.youtube.com/watch?v=oGCnwQSbScA
http://www.youtube.com/watch?v=Ry-Zv9osfjA
These are just a few examples of her versatility. And this is just one example of a playback singer that I feel has immense versatility in her voice. There are of course many other singers in our industry who show such versatility.
Also I feel that every singer should have a foundation in Indian Classical Music. Without classical music, a singer is nothing. I can certainly vouch for that as I myself am a singer without any classical training. And because I have no training in classical whatsoever, I find myself struggling with many songs!
Which singers in Indian Idol do you think excel in singing? Which have that versatility required by any performer whether they be a dancer, singer, or actor? What are you views on versatility within a singer. Would have to hear what you all have to say!