I've been replaying the Baldur's Gate series recently.  I never did play 
the expansion for either game -- Tales of the Sword Coast for BG1 and 
Throne of Bhaal for BG2 -- even though they've been sitting on my stack 
for a number of years now.  It's not that I didn't enjoy the games.  It's 
been more of a commitment issues; I found it hard to commit the kind of 
time that it'd take to finish these sprawling RPGs and their expansions.
 
A GWJ discussion on a mod for playing the games in high-res widescreen 
finally spurred me to action.  I finished the first game and its expansion 
last month.  Tales of the Sword Coast I found to be less than I'd hoped.  
More cramped dungeons that wrecked havoc with the game's poor pathfinding.  
Mostly it was a few combat-centric quests.
 
When I'd originally played the two main games, I remember being 
disappointed that BG2 lacked BG1's open world.  In BG1, you can 
effectively explore the entire world (or at least a very large portion of 
it) right off the bat, just by marching through each territory.  However 
in BG2, however, most areas outside of the city are not accessible until a 
related quest places them on your map.  And what I've found is that this 
constraint in BG2 makes for a tighter gameplay.  I wasn't overcome with 
the urge to continue exploring, resulting in a game with better pacing.  
Yes, there is exploring.  However it's tempered and a bit more spread out.  
You interact more with the game first, with the quests and with the NPCs.
 
They say the Baldur's Gate series reinvigorated the RPG genre.  I don't 
know how true that really it, but they sure are a couple of great 
roleplaying games.