Actually, from what I have read on some forums I expected BG2 to be far more difficult. I am a little bit disappointed by Firkraag And Kangaxx. I expected the red dragon to pose a bigger threat judging by his arrogant dialog where I promised myself I'll wear his skin as a coat. The poor critter went down from the first try. Keldorn and my ranger/cleric meleed him to death. The battle was very short, my party took no damage. I had a few summons and everyone was pretty buffed up, but still, I expected better from Firkraag. The shadow dragon was harder to kill, for example.
Now, Kangaxx was really lame. I killed him from the first attempt and with no buffs because I did not know he was going to attack at that particular moment so I was unprepared. It turned out it wasn't necessary to load game. He time stoped once, but he only managed to kill a fire elemental that Jaheira summoned during combat. Keldorn with Carsomyr probably played a major role in this battle. My PC was wielding Mace of Disruption, but the lich seemed to be immune to destroy undead ability of the mace. Keldorn was lvl 13 and my ranger/cleric was 11/12, the rest of the party couldn't even land a hit on him.
The only really hard fight I managed to get in so far was in a house in the bridge sector where you get teleported into a small round room. There is a beholder and a lich among other powerful creatures. That battle was truly insane. It took me 4-5 tries, but now Jan has a very cool stick