Sounding unique in solos? First of all: get a tape recorder. If you can get something that you can record more than one track, that's even better. We've had a lot of debate about how soloing should be approached on GT, so search around on the forums (I know you're new here - the search function is located in the toolbar - the toolbar is located in the box under the "Guitar Tricks Forum" sign).

Now the typical soloing approaches that I've come across can be divided in 2 sections:

1) Using your knowledge of scale and chord relationships, play leads and licks you already know from the approipriate scales (this seems like the one your doing).

2) Think of a melody, and go with. (This can be very vague, and harder - but it leads to the most original solo).

I like the idea of combining the two. Now about the tape recorder:
Record your chords. Now play it back, and hum a random melody over it. Transfer it to guitar. Now while on guitar, make variations to your melody, until it becomes completely new. Now apply this newly acquired lick(s) to your chord/scale relationships. After practice, you will be able to think of melodies and ideas quicker. Build up your experience first, start with slow, original melodic lines and move up.

I hope that helps.