4p0c41yp53n0w: I first tried BG once when I was in highschool and for some reason I got stuck at some point. I can't remember why. I'd like to run through this a couple of time since is so revered now. My question is, is it possible to upgrade wrong and then get stuck? Is it possible to just play casually without worrying about the numbers so much and still get through the entire series? Thanks.
I'd recommend playing cleric, paladin, ranger, or fighter as your main PC since they're pretty strong throughout the games (high HP, damage, armour, and saving throws). You can play something else if you really want to, just keep in mind that some of the other classes are a little complicated.
You'll definitely need a thief, one divine caster, and one arcane caster in your party.
Don't forget to manual save in case you get stuck again. Quicksaves and autosaves are plenty reliable, but every so often create a new save for different areas/quests. That way if you get stuck again you can easily take a few steps back. The saves don't really take up that much space - especially so on modern computers.
And in response to Belsirk, you don't need to min/max in Icewind Dale 1. A couple normal playthroughs and you'll get stat boosting items and potions that'll have your party's primary stats at 18+. On top of that you get a whole bunch of ludicrously powerful items. Min/maxing isn't necessary even on a Heart of Fury playthrough. Both my wizards ended up with 25 intelligence. You probably don't need ability scores past 18 in the Enhanced Edition because the new kits/classes straight up break the game.
You can't raise an ability score past 25, so if you min/max you'll probably lose out on some bonuses from items.