In the old days the very minor differences in race's capabilities loomed large because single points of intelligence or wisdom strength or what not made large differences in how the character worked out. Now, not so much... trolls and iksar IIRC correctly have one more point of HP regeneration and Ogres cannot be stunned from the front... but these differences are pretty well swamped by gear and AAs now ... so ... pick a race and goto town ... :)
Another thought is to try one race and if it does not work for you ... re-roll the character ... if u use "portable" armor (non-defiant) you should be able to save the gear for the next character you try...
Oh, and when I get another character slot I am thinking to roll an SK as well and though it has been some time I am thinking for me I will either do Troll or Dark Elf (though I may do DE for necromancer when I can add one more slot :))...