Lol, yea alot of people cannot stand Tony Horton, but he has me rollin' during the vids!
I wouldn't recommend checking the scale all the time and let your physical appearance do the talking for you. Also, if you not going for muscle build, you can always do the p90x lean routine and on resistance days do low weight higher reps. During the lean routine there isn't many resistance days though.
About the self-conscience thing, I dunno what you have to be afraid of lol. Unlike the shadow boxing incident there's thousands of people doing the EXACT same thing your doing so I wouldn't see what the problem would be.
Also, i just finished chest, shoulders, triceps today and I must say I am very impressed with my progress. I pulled out 15 psycho push-ups today, something I have never been able to do. If you don't know, psycho push-ups are a combination of clap push-ups and getting your whole body off the ground. Well that's not the technicle name, I just call them that because Tony talks about how he's about to go psych lol.
Lol, also, I was able to pull off 6 one-arm push-ups! Now this is a big deal for me, because I've never been able to do a one arm push-up in my life! I've always wanted too, but never succeeded. I am very happy about this!