Gashad said:
all mages are a massive pain
Firstly, I fixed this for you.
Secondly, whoever said BG2 is the best ever RPG is wrong, because that title evidently goes to Planescape:Torment. BG2 is second best, however, and I recommend everyone to play it BEFORE PS:T, because that other game is such a pain to get in to.
BG

A was a pile of rubbish, and doesn't deserve to be associated with the game. AFAIK it is totally unrelated in terms of storyline, and basically a half-cocked spin-off. This is not a reasonable way to assess the BG games.
It is complicated, I agree, and fairly unintuitive, but there are really only 3 things you need to know to get started:
i) Mages are complicated, and picking their spells is going to involve a lot of reading. However, much of it is an exercise in practise and experimentation, and as long as you have about 50% direct damage spells of one type or another, your mage will always be useful. Just use the other 50% of your slots to experiment. Actually, you ought to be familiar with a lot of these spells if you played NWN1, so you ought to be fine in regards to this.
ii) How combat works. The two main, totally unintuitive points about combat are THAC0 and Armour Class.
Armour Class starts at 10, and can be decreased to -10 (-20 in the expansion). THE LOWER THE NUMBER THE BETTER. Random, I know, but that's the truth of it. 0 is pretty average, anything below that is starting to get quite good.
THAC0 is about the most unintuitive thing ever, but totally determines how you do in combat. Its an acronym for "To Hit Armour Class 0". What it means is that this is the lowest number you have to roll on a D20 (20-sided dice) to hit. So, if your THAC0 is 15, then you have to roll between 15 and 20 to hit someone whos armour class is 15. Your opponent's armour class modifies this. So, if my opponent has an AC of 5, and my THAC0 is 15, I don't need to roll a 15 to hit, because he doesn't have AC 0 (remember what THAC0 means..). What I actually have to roll is 10 or above, because his AC is 5 above AC 0, and thus I gain an advantageous modifier to hit equal to 5. The same is true but in reverse when he has an armour class lower than 0.
iii) You desperately need a balanced party. Always have at least 1: Fighter-type (Fighter, ranger, paladin), thief, cleric or druid, and a mage. Other choices are optional.
Also, using 3 lower resistances, followed by a greater malison, and finally a chromatic orb (once your caster is above lvl 14 (?)) to kill a dragon with a level 1 spell is awesome.
Finally: NWN1 is not a patch on NWN2, and NWN2 is not as good as its Mask of the Betrayer Expansion, which is on a par with BG2, and BG2 is not as good as PS:T. But the main thing to note about this is that NWN1 is on the bottom rung of decent RPGs. Not least because the story for the original sucked absolute drawers. :/