Seasoned, you sound like many many guys that I know who learned trading in the mid-late 90's who got accustomed to reading the tape, scaling in to big sized positions shadowing institutional buyers and sellers and being able to exit with a reasonable gain without too much slippage because there was liquidity around. As you know, decimalization, nx, black-boxes and increased ecn trading on NYSE stocks have pretty much put an end to that. Some were able to change their style, others not. There was a similar wave in the high-flying nasdaq momo crowd, most of who crashed and burned after the bubble burst, although a few adapted and survived.
It sounds like you are still able to grind out some money, which puts you ahead of many and I wonder, since trading is what you love, is it right to give up just yet? Perhaps a head-clearing hiatus followed by a fresh start will do you good. Also remember, after being independent for so long I think it would be difficult to go back to working for someone else.
Good Luck