Vocals..
What is your mic/preamp setup?
One tip/trick that might help.. For the slower stuff with more vocal nuances, try getting right up to the mic, instead of recording from a foot away like you might for rock vocals. Get a really hot level, and mark the spot on your floor with some tape so you don't "stray" from the good spot and proper levels. The closer you are to the mic, the less you have to "belt it out" and it makes singing the expressive stuff easier. For the close stuff, sing through your head, rather than from your gut (if that makes sense).
Other stuff you can do to add "interest" to your vocals. Record two leads. One from close up to the mic, one from a foot or so away. Then mix the two in your recording. Use n-Track's volume envelopes to make one vocal take the "lead" and then smoothly move into the other so they go back and forth.
I'm also a big fan of having three of the same lead vocal tracks. The first track has a small room reverb about 60% panned left with no dry signal. The second track has a short 1-10ms slapback delay on it and is panned 60% right. The third track is totally dry, but with some compression and high frequency exciter added to it and panned dead center. This gives a full, rich vocal but with a lot of definition because the vocal effects are not cluttering up the vocal.
Another trick. Try recording your vocal listening to different parts. In other words, if your song has guitar, bass, drums, organ, and strings, try recording the vocal listening to just the drums and bass. Then try the vocal with just the drums and strings. When your ears hear different things, you will sing differently.
Another trick: Try recording vocals with just a tiny volume of music in your headphones. Then try it with the mix cranked up. Again, when your ears hear different things, you will sing differently.
Also, try taking one ear of your headphones off completely when tracking vocals. That can help you to better hear what you are doing.
Check out the vocals at this Mp3 site:
http://artists.mp3s.com/artists/244/uru.html
I'm not a huge fan of this type of music, but the mixing tricks they use on this woman's vocals are too cool. When you hear something neat, try to reproduce it.
Unfortunately for the cashless, decent equipment is a nice thing for recording vocals. At first, I was recording vocals with a
Shure SM58, and then bought my first condenser mic (AT3035). The differences are like night and day. If you have any troubles singing through a cheap mic, a decent condenser will
really let you hear mistakes or less-than-perfect parts. But, plenty of home recordists get good vocal results from an SM57 (I have before). A great vocalist through an SM57 will sound better than a lousy vocalist through a $7500 mic any day.
There are a lot of vocal tips and techniques. Just do a search and you'll find quite a few.
Hope these ideas help you to get the vocal takes you are looking for..