I booked early and managed to get a hotel room near the messe, so even easier to be there on time. What's a good time: an hour before opening? I'm not really into blockbusters either, so I can skip things like CoD, LoL, etc. Would just love to meet some devs and other fans 
If I find out that the plate is really too much, I'll wear something else on Friday... I heard that the current tickets do not allow you to go outside and come back later, right? That sucks... then I can't get back to the hotel to change clothes. Well, worst case I'll have to hire a closet to stuff my armor in (if it fits...).
Hmm... I hope that they will also have trailers with English audio... It's not that I don't understand German, but... My English is waaaaay better. I wonder if they'll have goodies at the bioware stand? I assume they'll be at the EA stand, as I could not find Bioware on the list?
Sorry for throwing out that many questions at you lot... I just want to prepare myself as good as possible, as I'll probably be there without company and it's my first convention ever (not including trade fairs)
Thursday and Friday I'd say an hour early is a good time, because those with Press and Trade Visitor tickets will be able to go in at that time. So even if it seems crowded at that time, which it usually doesn't, several people will go in and you'll have plenty of room to get in front for the actual entrance time.
The previous tickets for specific dates didn't allow you to go back in after you've left. This year you can only get the daily tickets, except if you're with the Press or a Trade Visitor. So I think people just assume you won't be allowed back in this time, as well. It could be different, but I'm not sure. I haven't looked into this problem, since I have a Trade Visitor ticket and this won't affect me. If all else fails, ask at the info booth and bring drinks and food with you, because it's rather expensive there.
Trailer in German was, as I said in the previous post, just speculation on my part. It might as well be the English trailer with German subtitles...or no trailer at all. ^^
When they were at GC with DA:O and DA2 they had goodies at their booth, like t-shirts(I think), inflatable swords, being able to take a picture with the DA2 background. Maybe they'll have something similar again this year. We'll have to wait and see. :-)