Discretionary. I seem to get better results and think my skills are better in that sphere than in systematic/quantitative trading. I don't think systematic/quant trading can really capture all the relevant market inputs the way a discretionary approach can. That said, if I found a quant approach that minted money with low risk, I'd implement it as long as it seemed sound and kept working.
That is true. With discretionary method, we could take all the current events into consideration and analyze the reaction of correlated markets before we place a trade. With quantitative method, it may got more to do with mean reversion using some PhD-level quantum physic math to calculate the probably of winning in the trade (yes, I have no clue about quantitative). However, if it does make money, I would love to use it as well. PA