shadowfox
Anime Junkie
How custom can your ships be?
Hmmm ... I'm not sure how clearly I'll be able to explain this without screenshots, but I'll give it a go ...
Each ship class basically has 3 variants, and each ship consists of 4 ... errr ... parts, if you will - Saucer, Hull, Nacelles and Pylons (the bit that attaches the nacelles to the hull). Your customization lets you alternate the parts, so in the case of my ship in the picture above:
It's a long range science vessel that comes in 3 variants: Intrepid, Cochrane and Discovery. So you can for instance use the Discovery Saucer, Intrepid Hull and Cochrane Nacelles and Pylons, as an example. There are also 4 different types of hull materials which can change the appearance of your ship to a degree, and you can also apply certain two colour patterns.
So while you are limited to using the specific variants within each class, you can end up with a ship that isn't totally similar to everyone else's.
I've heard there is a lot more customisation available when you get to Rear Admiral, but I haven't gotten that far yet, so I'm not sure.