Am I too nice?

Back in December, around Christmas time, I was hiding myself in the office alone so that I could finish a research paper. The main difference between this paper, and all other papers that I've written b4, is that I am pretty much writing this paper on my own, without my boss being on my tail and re-editing it word by word. So, in other words, this paper stands for a test on how well I can write research paper myself.

Well, I dont get an answer from the conference on whether the paper is accepted yet, although I dont really have high hopes. That's becuz of the comment that my boss gave me after he carefully reviewed my paper:

The paper is not aggressive enough! If the paper is killed, it's becuz you are too nice on trashing other ppls work...

So, am I really too nice technically? Hey, I am still really green in my research area. I dont wanna go around trashing other ppls stuff with a nasty attitude so soon. I need to build my reputation first, then when I trash other ppls stuff, they can be more convinced.

Oh well, overall, I am still pretty happy with this paper, since it's the first paper I've written purely on my own, and even my boss can really take it apart easily. It's just not aggressive enough on how i convince ppl about my stuff.

Am I too nice?