> Is HN only about saying nice things about everything?
This implies fault lies with HN. You make the assumption that you are right (despite your PS).
A better question is:
> I'd like to contribute; can anyone offer advice to improve my comments?
Humility, and no assumption.
Again, here:
> I don't know maybe it's me, maybe I have too radical opinions on stuff.
Again, this is conceited. It's not your 'radicalism.' It's your ego talking.
> I am not saying neither that I'm always right nor that I never deserved the downvote.
But your entire comment suggested that you weren't in the wrong.
> I may be alone in this, but I like expressing my thoughts/feelings, as a matter of fact, most of the time I want to make it really clear that what I say is just my the way I see it.
No, you aren't. You aren't "alone" in this. Rather, your ability to communicate effectively is lacking. Indeed, it's very egotistical. You're focused completely on "your opinion" and frankly, your opinion holds no value.
In all your comments, I see you place a lot of value on your opinion. Your opinion can't be wrong, and it's yours, and you'll share it. But who are you that we should care about your opinion?
This doesn't mean you can't offer opinion. It's just that you need to qualify you opinion with reasoning. You can't just state an opinion and expect everyone to see the wisdom.
Listen, you seem like your interested in providing value here. Disagree with whatever you want. But don't just disagree, explain why you disagree. With examples is best!
Be specific.
Do more than ask pointless questions (especially questions that are answered). Anyone can ask questions.
> Vertical list of applications??? Microsoft what have you been smoking?
Provides no value.
> Vertical list of applications? I'm not sure this will grow well. As users add applications, it will make for a lot of scrolling.
Goes further and provides actual meaning. People might still disagree, but now you've explained your opinion.
You've generated discussion.
Hopefully all of this (thread) helps! =)