I really hate oracle.
I hate the fact it has huge memory usage spikes with queries containg nclob.
I hate the way you have to reinstall it two or three times to get rid of that wierd driver error.
I hate the fact there's no freaking way it'll work if you try and install two different client versions.
I hate the fact indexes are not used if your NVARCHAR2 is a little too long, but NVARCHAR is ok.
I hate the fact one error code can cover 25 different problems.
I hate the way the GUI has at least a 2 second lag time and message boxes pop-up telling you what you just clicked on.
SQLplus is w$nk, but it really improved my typing! I love the fact you can't use the cursor, cycle old commands or edit anything inline. (Yeah I know about ED)
I'll be back with more, thats just off the top of my head.
<FONT size=1>ORA-12514: TNS:listener does not currently know of service requested in connect descriptor</FONT>