Fenixp: You know, BG aged pretty badly, from most points of view. It wasn't such a great and revolutionary title even when it came out, there were 'better' RPGs out there, and today, aside from exploration which is the only redeeming quality of that game, it has only a very little to offer.
I do think that the score of 6 would be more or less warranted for the game.
I have to disagree with you completely there having just played the game about a year ago. I don't think it aged badly at all, particularly when you install BGtutu for enhanced visuals. I also installed a fixpack to squash some old bugs and another mod to give me back the original Baldur's Gate UI, at least in appearance because I liked it and wanted it to look true to the original. I found BG2 visuals to be pleasing to the eye, colorful, detailed and with plenty of variety in environments to explore.
The game is challenging and fun because of it. The tactical combat was great. I loved the way I could pause and issue orders and then let the action play out some more, etc. It was very challenging and even scary taking on powerful casters at times.
As a D&D game, character progression and gameplay itself were fun for me. I had never played D&D anything before and had to do a lot of reading before I even began to really get into it. I don't think this was required particularly but it added a lot to my enjoyment of the game, the depth and richness of it.
I enjoyed the story of the game which was good if not particularly complex. There were some very memorable battles along the way that felt like accomplishments to win. In fact, completing that game felt like an accomplishment of sorts since it offers many hours of challenging and entertaining gameplay.
The npc companions you meet and can take with you along the way and their interactions with each other were great and enhanced further by an NPC banter mod that is popular among those who mod the game.
It was in fact a great and revolutionary title when it was released and was credited by more than a few for resurrecting the PC RPG genre at the time. You say there were "better RPGs out there" and I would love to hear about them. Just exactly what RPGs were better than Baldur's Gate on PC in 1998? I can think of only two other RPGs that year which you could argue were in the same league although they were very different games, neither of them being Dungeons and Dragons games: Fallout 2 and Might and Magic VI. Those three make for a pretty good year for role playing games but it isn't like there was tons of greats and BG was just so-so.
I think I've made some case for Baldur's Gate's "redeeming qualities" but perhaps you don't enjoy D&D roleplaying games or maybe you don't like tactical party based combat, etc. That's fine too. We all have our preferences but I really could not bear to read that Baldur's Gate "has only a very little to offer" without replying to it.
The original release in its day earned itself a 9.2 and in my opinion, deserved it. Here is the review for anyone interested:
http://www.gamespot.com/baldurs-gate/reviews/baldurs-gate-review-2538129/
As for the review of the remake, they make clear at the outset they are reviewing it in terms of its merits or lack thereof, as a remake. The score of 6.0 indicates "fair." They are not saying it is terrible or bad but simply that the remake is underwhelming in their opinion which many seem to agree with. This mediocre score is not a reflection of the quality of the classic game itself which is good because Baldur's Gate is not a mediocre game. It is a classic.
I feel better now. :D
Oh! I forgot to mention the music is really great too and if you don't love Imoen and Boo there is something wrong with you!