Ok so it's kinda unimportant but i've heard a lot of players complaining about the facts that reanimating a skeleton (wich is the only worthy to be used undead summon in my experience) means damning the soul that was linked to the skeleton. I will not make a defence of the morality of necromancy because it's not what i'm aiming at. I just want to point out that skeletons and zombies have NO soul, with those two types of undeads there is not a soul that's beeing misused, quoting for the monster manual 3.5 about skeletons: "It can draw no conclusion of it's own, and takes no initiative". The main difference between sentient and non sentient undeads is that the sentient ones (vampires, litches, mohrghs, wights, all the ethereal ones etc.) have or are a soul, the non sensient ones (mostly zombies and skeletons) doesn't have one, nor they have an actual will, in game context technically the skeleton is just mindlessly charging at anything that could be a danger for it's creator but there's not a soul suffering behind it. I'm not saying basic necromancy shouldn't be shunned because there are many other reasons why the undeads aren't good, but GENERALLY (and i'm saying generally because i think it still should be up to the player playing a necromancer) non sentient undeads aren't suffering, they are just dangerous.
Now, i think "souled" skeletons are quite interesting, it can give some various motivations, and backstories and it's all good. I think we should all try to be flexible and tollerant with each others ideas and rp choices, but on the other hand i see "souled" undeads as the exception, and not the norm. But also, if we accept them to have a soul, then we give them personality and we do open up the possibility of having willing skeletons serving for any reason their creator. Because if we give soul, and personality, we also open the door to motivation.