[Ledhead V-2]

I practice both learning songs and improvising equally. I'll spend some time adding a few more chords or notes to the tune I'm currently attempting to get down and for a change of pace I'll alternate and give a go at making up my own riffs. Problem is, when I think I've got a nice little riff or solo worked out, it never seems to sound rock-like, which is what I'm aiming for -- they always seem to wind up sounding really cornball, "Jimmy Crack Corn"-ish if you will. Anyone here know what I'm talking about, or do y'all think ol' Led's been bending his elbow before posting? Any advice on working out riffs, however short, that have a distict rock or blues feel to them? All input appreciated...