I even didn't installed my retail copy of the first one.

Then you missed out on one of the best stories of the past decade.

but i hate Shepard.

Why? Play the Shepard you want. Or do you mean the voice acting?

Mass Effect 2 is an amazing addition to what will go down as one of the greatest trilogies in gaming history.

Best stories? Mass Effect? Oh, brother. It's like saying the story in MW2 is really deep and engaging with many twists and turns. Or Oblivion.

The male Shepard? Or the female one? What's bad about him/her?

Firstly I am talking about Science Fiction stories. Mass Effect has a better story than frikkin Halo or any of the Star Wars Prequels.
Secondly Oblivion's story was generic with no originality whatsoever.
Thirdly it's my opinion and I am entitled to it. I have enjoyed both ME games a great deal and while they have a lot wrong with them what doesn't?

"Why? "
I just can't explain it. I've got the same thing with DAO.

I thought that Mass Effect was a decent game. While it wasn't one of my favorites, it was still well above average (and better than most). That being said, pretty much ALL of the changes in ME2 were improvements over the original. The stuff that they removed was poorly implemented in the first place, which creates a situation of addition by subtraction. "The inventory system sucks" so they removed it. "The Mako was clunky" so they removed it. The weapon system made it far too easy to create infinite super weapons, so they tweaked that. Combat was streamlined. It's actually GOOD now. The story remains vastly superior to most RPG's and certainly better than any other space oriented/sci-fi RPG. Mass Effect 2 might not be game of the year (it's far too early to judge that), but it's definitely brilliantly done.

We're talking about the original ME, which I do have, and have completed.
It's story isn't the worst to come out of Bioware in recent years, but I found it ... meh. Saying it's better than Halo (which it is, obviously) doesn't save it.
One of the major things I hoped for Bioware to fix in ME2 was the story. Afterall, we know Bioware can do really good stories, for example the Mask of the Betrayer expansion for NWN2. Or Dragon Age. But apparently the ME2 story is every bit as cookie-cutter as the original, and that disappoints me.

you mean you're a blind fanboy who won't play it just because it isn't made by Nintendo?

It's clear by now that the original poster likely expected a knee-jerk reaction that mirrored his own unsupported distaste for the game.
Maybe it's because the game is still a full priced title from the modern age (we're only allowed to love old games here right?) Maybe it's because of some long seeded gripe with Bioware. Who knows, because the original poster hasn't actually offered his opinion. He just posted someone else's and then scoffed at the opinion of others without elaboration.
I loved the game and it sounds like that's been the general experience of the people playing it. Beyond that, it's sold more than enough copies to ensure that the MANY of us who don't agree with the OP or the article linked are going to see the third game in the trilogy.
It's hard to be grumpy about that, even if people still use the internet as the ultimate weapon to undermine one another--myself included I suppose.

I would say no it isn't, in fact it explores the ME universe in even more depth. However since you don't particularly care about that universe I won't bother. It would be like telling someone to read The Hobbit when they hated The Lord of the Rings.