Yeah man it totally depends.
If you listen to some of Chicane's new stuff (Off of "Giants"), it's pretty trancey.
He'll sometimes have a pretty week kick drum and a real overpowering synth lead and lead bass.
Then there are those artists that have a real heavy kick drum and thinner bass line. It just depends.
Listen to a lot of different artists then try to come up with your own mixture of kick/bass. Depends on the feel of the track too.
You can try some sidechaining if you want a loud full kick and a loud full bass line going at the same time...
It seems like trance traditionally has a weaker kick than other techno genres, but that's not always true.