Noawadays, the Dreamcast is one of those cases where it depends on what your dedication is to trying out niche arcade titles like 2D shooters as to whether it is absolutely worth getting one because some of its highest scoring games ended up on the PS2, Gamecube or Xbox and some, like Jet Set Radio, on Xbox360 or PS3 download.
When it was launched, however, it was a different story. It was amazing, it was mysterious and it was absolutely cutting edge. You still get that feeling from looking at the console. An elegant, understated, powerhouse. When you play Jet Set Radio or the simple but perfect Crazy Taxi or hear about Seaman (never played it) you see that the Dreamcast really was kind of an experimental art idea to amuse as broad a number of tastes as possible. In that respect, it's a worthy part of history no matter what its success was (it only sold slightly more than the Saturn, a terrible statistic considering that the Saturn didn't seem serious about getting mainstream gamers in the way that the DC did) and no matter that it also happened to be the first to support wordlwide online gaming. Sony kind of took on the arty idea with the naming of 'Emotion Engine'as the PS2's processor and with games like Ico. They really seem to run with Sega's clothing and probably still do.
Anyway... as you already have one and my above post is kind of redundant, it is worth having such a beautiful console in your presence.
If you don't already have Sonic Adventure 2 on some format, get the original.
Don't get Crazy Taxi 2 unless it's about 3 or 4 pounds. It's set in New York which is a very dull setting for the game compared to the San Fransisco of the first game.
Shenmue is not everyone's cup of tea.
Personally, I would most enjoy having the Dreamcast for Alone in the dark: the new nightmare. It's a great survival horror.
But I would be careful about Resident Evil : Code Veronica. Some pour great praise on it but I found it very dated.
<message edited by Picnic on Monday, December 03, 2012 2:35 PM>