I apparently spoke too soon. The system doesn't shut down, but it completely hard locks at random intervals...requiring a restart. It's nothing I can replicate and there doesn't seem to be any specific time fram that does it.
While I was liking the Sylvari story, I wasn't warming up to the Thief class at all. Rerooled a Charr Guardian, and am liking that much better so far. Even if playing as a giant tiger is just...weird.
I recall a quest at some point where I got to play as essentially a "bad guy" Thief (I think?). If it was, I could tell right away the class was going to require a lot more coordination than I'm generally capable of.
The Warrior (got mine to L56 yesterday) and Ranger (have one at L28 or so) so far are my sweet spot. Have an Engineer and Guardian in the teens. I'd like to try to get at least one character to the L80 cap by the time Heart of Thorns launches.
I still feel like it's when I'm playing solo or just alongside maybe one other player that I have time to indulge in carefully blocking, using the dodge etc. In larger groups everyone switches to Zerg rush mode and I feel like I don't really have time to use deliberate tactics if I actually want to get any damage in. Not really a complaint, just an observation.