[Neo the Warrior Cat]

Dwarves are good pure fighters and they make one hell of a good Fighter/Cleric multiclass (the ability to have 19 constitution is a boon to their hitpoints)

Dex, Con, and Wis only affect saving throws in games based upon 3rd Edition rules, which IWD is not.

Well researched, but fitting to another's playing style, I like having access to my magic 24/7, not after dual-classing. (I also find a party of mostly humans to be a bit dull and boring >.> )

Humans have the ability to dual-class, which makes them rather unique in that case. Half-elves have almost every multi-class option open to them, including triple multi-class options.(But I find that triple multi-classes can be quite underpowered at times, they fit more into games like BG2)