Best LH: Etihad. I couldn't exactly put my finger on what it is but they were undoubtedly the best. They're on board catering was outstanding for economy, I just wish they used EK's ICE system! Their IFE is IMHO what let's them down, and flying 24 hours from Australia to the UK is an important factor.
Best SH: Qantas. I honestly cannot think off any other airline where you still get full meal service (including complimentary wine and beer with dinner) on a 1 hour flight! Perhaps on the likes of SQ SIN-BKK and EK DXB-DOH but certainly not in Europe/North America.
Best LCC: Virgin Blue. I honestly cannot fault DJ at all other than (in my personal experience) their time keeping being pretty lousy (6 out of 9 flights delayed by over an hour, including an 8 hour delay at CBR - which is TINY!)