Licks in 12 Bar

Hello David

I really do love this stuff and the journey is very rewarding.  My frustration is getting more hours to work your material.

Two questions come up in my mind in today's practice

1- We are working the 12 bar blues and it seems to follow a preductable chord progression.  When I listen to various blues artists only some of their work follows this.  What other blues varients are out there?  My wife who is not really into blues (so much) tells me all the music sounds alike.  Perspective please..

2- Now understanding better the chord porogression am I understanding that really any of the (example) I chord licks in your study songs could be inserted into any I chord phrases during improvisation?  

Thanks

gary (Level 4)