anyone good at cracking apps?

anyone got experience of cracking moderately to difficult apps?

I'm learning to crack apps but need a mentor to assist me through certain aspects,

I used to be very interested in cracking apps, decompiling, etc. Mostly for the challenge of it, like any kind of hacking. Then I became a software vendor.

Not threadcrapping, just suggesting from experience, if you want to gain a truly valuable skill, start building your own software - far more fulfilling (and difficult) than cracking others!