[Updated at Game Update 1.2]
Now here's an interesting Crew Skills map, from a slightly different perspective. It shows which class categories (Force/Non-Force users) benefit more from a specific crew skill and also, which are their complementary skills, in order to benefit more.
Now it all depends on what you're planning to do with your Crew Skills, either max profit, personal gain or a bit of both. If you're planning on max profit, then you need to take into consideration 2 simple factors:
1. What are the most played classes on your server - again, the map comes in need, you can easily see what they need the most. For example, if you want to feed the Jedi population, Artifice
is the way to go, along with Archaeology.
2. What are the GTN prices for the gathering materials. My thoughts, there will be sufficient gatherers in order for you to re-think you Crew Skill strategy, to maximize the gain..but that's a slghtly different story.
If you're new to the SWTOR Crew Skills thing, you can check our Crew Skills Beginner's Guide