[QUOTE=Chrizum]BG1 was so absorbing, the game felt like a real authentic medieval world, the music was superb, all the taverns and woods and all the like, it was great![/quote]
There wasn't a single authentic piece of medievalism in BG1. It was ersatz all the way, just like every other RPG, with the exception of some details in the more-than-a-decade-old Darklands. So if you imagined that BG1 was authentically medieval, then of course anything else, including BG2, wouldn't match this. You've got an image that you like in your head, and nothing else would match this.
The pirate village was nice, but... I just miss the BG1 maps! The music is not nearly as good too.
Did you miss the lack of map labels?

I know one of the things I greatly enjoyed in BG2 was the way your automap properly labeled important buildings when you entered an area. I hated the fact that BG1 didn't do this.
What I'm wondering is... I'm at chapter 4, I'll soon be in chapter 5 (I think), will BG2 get better after this? Will I go on a real adventure, wandering through woods and over mountains,
When BG1 appeared, one of the strongest criticisms voiced by players was the need to constantly walk from Spot A to Spot B, over and over; which was why BG2 allowed you to automate the large distance, leaving local areas to be explored. It seems you prefer the way BG1 handles things, but you'll simply not find that in BG2. I suggest a game like Morrowind, where you can always walk through a huge land filled with incident, if you don't wish to take alternate modes of transportation.
What does BG2 offer? Far greater party NPC dialog and involvement in your life: they really seem to have individual personalities, unlike the ciphers who joined you and uttered a single, repetititive line in BG1. Far more in-depth quests, sometimes with genuine branching (which you've yet to encounter). Inventory items to collect those endless arrows, bolts, scrolls and potions within single holding spaces. More professions, including one of my favorite, the Wild Mage; more items; a shopkeeper who will gladly combine some items for you. Somewhat better pathfinding (though Bioware never did get that completely right). A much larger game which has also drawn the attention of a variety of excellent modders, whose work should definitely be seen.
But if none of these elements do it for you, as I mentioned above, consider Morrowind. It's a first-person, single-person game, but with an enormous, beautiful 3D world, excellent interactivity, and probably 100 hours of gameplay if you don't pursue the main quest immediately. Add in tons of mods, and you could triple your gameplay hours. Up to you.