Dreamcast was a great little system. I couldn't stand HOTD2 though. I was a pretty hardcore arcade gamer, and the lack of accuracy on the lightgun drove me nuts on the home version. VF3TB was amusing, but it just played too differently from arcade version...
Now that I think about it, what kept me on that system was Sega Rally. It didn't have the depth of gameplay as the arcade version, but with all the cars and tracks, yup lots of hours playing that.
Never got into Soul Calibur... I remember playing the original (when it was called Soul Edge) a lot in the arcades, but after the first FOTM three weeks or so, we ended up going back to VF2...
Best,
-Jason