OK, now that we have picked on Oracle let's point out a few of its good or unique features.
1. Spatial data is an interesting feature hardly anybody uses. Storing geographical data with a time dimension is cool. I'm sure it is critical for all of our weather system and many more system like that. How would we know how much snow ground cover exists so we can go skiing or snowmobiling.
2. Oracle's partitioning, parralelism, and bitmap indexes make very large tables and lookup indexes easy to managing. They require less disk space then the SQL Server indexes and stats.
3. Nobody but the Oracle DBA can get into your system and do anything. I know everyone thinks this is a limitation, but Oracle took this design path to keep the novice out of the system. This lowers the number of calls into their support centers.
4. Oracle's Enterprise Manager will show you how many blocks still need to be processed for a sessions current statement. When running long statements it is nice to see the estimated time of completion as well as an indication if things are hung or still processing. Basically you don't have to just wait forever or always kill the session and start over when you are developing/testing different approaches or managing very large tables.
5. Did I mention nobody else will really knows Oracle and you will be the Oracle god everyone has to come to. Oh, ya that part actually sucks because then you have no time to do anything really important.
6. Oracle's internal table compression is nice if your data is read only and you sort it accordingly.