Nice guide for new rogues.
When I started my rogue alt I went for a subtlety build using daggers for dps, because it seemed 'rogueish' to me. This was a while back, but I don't think the tree has changed much since then.
I found grinding very slow and had trouble dealing with multiple mob pulls (as most of my grinding was focused around being able to get behind the target). Having to stealth for the best opening also puts you at a disadvantage when ranged pulling would be better (to avoid adds).
I got my rogue to level 30, had some quite nice gear as it was an alt (triprunner dungarees, toxic revenger, tigerstrike mantle), but I didn't enjoy levelling it very much as I found the combat quite slow. Having been a target for rogues on my druid I was expecting something a little more OP.
Eventually I changed server and sold all my rogues gear when I decided to transfer my main to my new server.
A little while ago I decided to give rogue another shot. So I transfered my naked, talentless (BC having reset them) rogue to my new server, geared her up in greens and a crafted blue and on the advice of the forums specced a combat build and made myself 2 swords.
The change was just amazing. I really enjoy levelling my rogue now and can deal with extra mobs without too much hassle (providing Blade Flurry is up :P), I've not done that much pvp but when I have I managed to kill my opponants quite quickly.
I think the damage output of combat swords is just a lot better than what you can acheive with subtlety, trying to position yourself behind a target in solo pve is a lot of trouble, it's much easier just to run straight at your target and batter it to death.
I think that you learn most about your class through playing with others, rather than through solo play, regardless of how people level most of them will still suck on their first character that hits 60 (or 70), I know I still had a lot to learn about druid when I hit 60.
This is a nice guide, with some good tips about the easiest way to level up a rogue. I wish I'd read something like this when I first made my rogue.