Let me give just three reasons. There may be many more.
1. Rajeev is a brilliant actor. When he acts he gets into the skin of the character.
2. Rajeev is a star. IN tv world he is one of the very few actors/ actresses who is a natural star. When Rajeev is in a scene , noone else can take the limelight. All our viewers eyes follow him only.
3. Rajeev lights up the female costars. I think every female costar feels very comfortable with him. He is a born romantic performer.
Not to mention other personal and human qualities of RAjeev.
And if there is a club to bash up Rajeev, I am glad about it as it shows how important is RAjeev.