What king of oolong tea are you brewing? Who makes it? What cup/teapot are you using? If you're using low-grade tea, it's never going to knock your hair back. And if we don't know what oolong you're trying to brew, it's going to be tricky to give you more than general suggestions. So PLEASE HELP US!
I never loved
oolongs until I brewed them properly either, so you're not alone. Two huge red flags that pop up immediately for me are your temperature and brewing times: 212* is a little too hot for the first couple steeps of most oolongs, while 3-5 minutes is a bit too long to notice all the tasty subtleties of a good tea.
If you're just dumping leaves in a cup, try using one rounded tablespoon of leaves and 3-5 ounces of (near-boiling) water for 30 seconds, strain it into another cup, and see how you like the taste. Then try re-steeping those leaves for 45 seconds in near-boiling water, and see if you can taste any differences. Then try 1 minute. Then try 1:30. Then use boiling water and steep it for 3-5 minutes, and see how much MORE tea you can get out of these leaves.
Good oolong tea can take between 5-10 quick steeps like this, and it's a lot more fun to taste it as it evolves (rather than getting one big, bland pot of tea). If the two cup idea is a bit cumbersome, you might want to look into a small (70-100ml) porcelain gaiwan to try and brew it up proper.
Hope this helps! Don't forget to take a peek at the Oolong vendor guide for tea suggestions, and read the TeaClass
entry for more in-depth info.