Just a little feedback
I'm in, level 31 Juggernaut on Helm of Graush. So far, I've found for pvp the warzones are difficult, especially against the beta guilds but we're going to get there.
Juggernaut takes a while to warm up, takes some levels before you get good. Already level 50 players, I'd love to have that much time but level 31 before the game officially launches is a pretty good pace.
The server I'm on seems to have a better balance than the others. I knew the dark side would be more popular but not to the extent it appears. I know in Star Wars Galaxies, most servers were skewed to the rebellion so I assumed light side would appeal but I guess with no skywalker and a younger crowd, the dark side seems to be the preference. Obviously as people play through their classes it may even out once they get around to rolling republic characters.
If you want credits, slicing is the way to go at first, already doing level 6 lockboxes and it makes everything affordable. I'd recommend it to start to help supplement your other crafting professions and future characters. Once you get 3 companions you can really start cranking the crafting portion. I was actually tempted to buy a laptop for work to run crafting missions as they take about an hour to complete. I don't think credits will be needed near as much at end game.
Even on a pvp server the open world pvp encounters are few and far between. I've only had chance to kill 3 people outside warzones, ganked once as well. If you're dark side on my server, don't hesitate to give a holler if you want to pvp, character name Temper.