They don't really look organic, especially with all of the runes and energy circles floating about them. Also, keep in mind that the Spelljammer D&D setting, off of which the Magic races are in small part based, there are plenty of examples of organicy-looking ships. Most notably, elven ships tend to look green and living... It all depends on the race's style...
Examples:
http://spelljammer.org/art/pic.cgi?Elven_Warbird.jpg
http://spelljammer.org/art/pic.cgi?manowar.jpg
I wish someone would have taken my request to make shipsets based on stuff like those... as well as others on:
http://spelljammer.org/art/index.html