I myself have recently taken my guitar playing more seriously. This, after years of casual messing around with easy rock tunes.
I decided to get into a style of music that will hook me. I'm a big Beatles fan, so I went with what got them into music: the blues (i.e. R&B, rockabilly, etc.).
I picked up a book that will teach me the blues basics, and I'm going to go with it. I'm saturating my ears with recordings of all the greats: classic blues, blues rock, rockabilly, R&B, etc., and it's sitting me down with my guitar on my knee. I'm already practicing things I've never practiced before, such as the pick-strum technique of country blues. Plus, I'm much better at the pentatonic scales than I've ever been, which isn't saying much, but, hey, I've always been frustrated with teaching myself. Now I'm seeing progress because I'm working toward something I love in music: them blues, the grandaddy of rock & roll.
Robert Leroy Johnson (1911 – 1938)