Hey there Jourdan,
I checked out a couple of your soundclick tunes.
I really like the vibe you've got going on in the Country song.
You have a great sense of melody.
I have a little tip for you regarding vibrato.
Sit in front of a mirror, and watch your hand, as you gently move up to and down from the note.
Do it slow, with purpose, don't go spastic!
It should allways be well controlled and smooth.
Slowly speed up, over a month or two.
To get it fast, let your biscep flop around; it kind of wobbles.
Practise all different types, wide, short, fast, slow, agressive, sweet.
Vibrato is your main meal when playing
slide.
Watching yourself in the mirror seems to help a lot, just don't let anyone catch you! (They'll think you love yourself).
I've had many students who found this helpfull.
Let me know if it helps.
LB.