I have done a lot of modding of my phones over the years. Particularly the original Desire, which because of its limited storage really benefitted from some serious modification: certainly the most stressful thing I've done was flashing a bootloader that I'd just edited myself to adjust the partitioning of the internal storage (because if you screw the bootloader up the phone really is hard-bricked unless you have a JTAG rig, and the file I was flashing was by definition untested). But as time goes on I've found less and less need, and my current phone is still stock.
By the way, the forum rules forbid discussion of piracy ( "paid games for free"). The repository you name is also infamous as a source of malware infections, so I'd strongly disrecommend it anyway.