I'm still working my way through the classics--I've been skipping around by companion, but I've definitely seen the entirety of Five-Eight and dabbled in the extended universe novels and audios a bit, as well as seen Scream of the Shalka and Curse of Fatal Death. The older series is much easier for me to sit still through, to be honest. I imagine it's probably because of the serial pacing, which is easier for me to manage. I've seen a few serials of each Doctor, though, mostly because I wanted to figure out where I wanted to start. They're all so precious. I love them. And I love the creativity of their sets/costumes/monsters. I'm at the point where, if we ever land on another planet and it doesn't look like a quarry, I'm going to be severely disappointed!
My current favorites are Colin Baker and Sylvester McCoy (not that anyone would've been able to guess). Honestly, I've loved just about everything I've seen of the old series. If I'd listened to most of the Internet, I would've never gone ahead and watched it. Honestly, all of the stories I was told I'd hate, I ended up loving. Especially Trial of a Time Lord. I plan to marathon the entire thing some weekend.