I've used Opera in the past *very* casually, used v 9.64 portable version from Kejut.com. I'm very impressed with the improvements made since then!
And doubly impressed by all the research and discussion that have gone into this thread, thank you joby_toss!!!!
I'm trying to get educated about Opera, and have run across some good info here and there. Way back almost two months ago Guinness suggested posting links to websites, and so here are a few sites where I found some good tips. Maybe some of them are resources that you didn't already know about. Don't be discouraged that many of them are for version 9.x, most tips will still apply to v 10.x.cybernetnews.com
(check their Web Browser Wednesday
posts too, and find other browser tips.)MakeUseOf.comHowToGeek.comAddictiveTips.comhttp://www.mydigitallife.info/
has some older posts, not much current.gHacks.net
, mostly news announcements, but has a few how-to posts.
There are some very helpful blogs on the http://my.opera.com/
site, but right now I'm blocked by corporate policy and can't snag any links. Look especially for blogs by Tamil and Rijk.
Maybe you'll find useful info on the official support forum on the myopera.com site.
If you have the patience to wade through it, there is also a support group on Google Groups