Played alot with my cube today... I'm now at a 47.55 avg (10 out of 12)(with the same method I used before) and a new personal best of 36 secs ( with a two look last layer instead of 4 look) ... now I dont know if I should stick to fridrich or keep learning roux :S Is it that hard to get sub 20 with roux? Because I can see myself geting sub 20 with fridrich if I learn all the algs and pratice looking ahead more.
edit: new lucky solve: 33 sec
I'll tell you right now, you can probably get sub 20 with Fridrich in half the time you could with Roux, HOWEVER; to do so you will have to memorize over 50 algs for OLL, and 21 for PLL, AND THEN if you want to learn the fancy F2l algs you're going to need to learn those on top of all of that, what a snooze fest! I could easily have been even sub 16 by now if I went for Fridrich, but it bores me to intense disliking of cubing. If I didn't learn Petrus, I wouldn't be cubing right now.
Also;
I feel like blockbuilding gives you more of a real understanding of how to actually solve, and comprehend every move to solve a rubik's cube. I see so often people who memorize over a hundred algs, and then mindlessly spam the cube with them, without any understanding of what they're really doing. It becomes a matter of just memorizing the solutions to every case, without knowing how to do them efficiently otherwise. So I say, blockbuilding FTW.