The Eberron campaign setting, which DDO is mostly centered around, was created with the idea that “the creatures of Eberron are not bound by traditional alignment restrictions” (Eberron Campaign Setting, page 250). In game, this is seen rather frequently if players pay attention. An innocent kobold hires adventurers to find a peaceful method to remove hungry dogs from his sewers and into the fresh air. A paladin by the name of Oisin the Merciful attempts to kill adventurers on sight when said adventurers trespass upon the Hidden Chapel. Even a vampire can be found within the House Jorasco Enclave offering potions in exchange for necklaces.
However, as many of these examples exist, adventurers themselves are somewhat restricted. The racial options are, for the most part, limited to members of the traditional common races. There are exceptions, and these are the iconic races/classes, and the drow (I consider the warforged to be a common race). Other than that, many other intelligent creatures appear to be forbidden from owning the title ‘adventurer’. Although, to be fair, a few of said monsters may be too large or too powerful to be playable, save as an iconic class (possibly).
Alternatively, a few of the playable classes and class options would be fit for the path of darkness. Warlocks, for the most part, are centered around evil, being able to make pacts with fiends of the lower planes. The Pale Master enhancement line allows players to create undead to do their bidding, and even turn themselves into a zombie, vampire, wraith, or lich. Similarly, warforged and bladeforged clerics, paladins, and favored souls have the option to receive their divine magic from the infamous Lord of Blades, who has been appointed to end boss of a raid named after him (a divine caster could potentially kill their own deity. Just saying.). Drow have the option to worship the mysterious deity known as Vulkoor, whom scholars suspect is an aspect of the Mockery, one of the Dark Six.
I’ve provided my opinion, and some evidence. So, what do you people think? Should there be evil alignments? Playable monstrous races? A combination of the two? Or do you think the races, classes, and alignments are acceptable the way they are?