"can only individuals who are decisive and self-controlled commit suicide?" is a question worth examining the fuck out of IMO. examining just for the sake of it and to reduce hospitalizations for people who say they will commit suicide but may not have the ability to.
i talked briefly about it to an LIE criminology professor i had, and he said something like yes, it would require the individual to have high self control because of decisiveness. i also asked him if my self-control was high, and he said it was higher than some and lower than others. i've always thought my self-control was not high partly because i doubt everything, and partly because of how my behavior was in the past. i guess have medium self-control, but i'd rather just have my satisfaction or get my shit out and i figured i couldn't enjoy my life much if i didn't act impulsively from time to time, so i've never tightly controlled myself and i'm not capable of it anyway.
LSIs, especially the logical subtype tend to not have high self-control, they tend to not be inner directed; something I've noticed is that both subtypes tend to have those fluctuations especially when dealing about themselves... their EIE duals seem more decisive and more confident in their decisions at least when taking action. The sensory subtype seems to think things out more, but in some cases even they have seem to have less self-control over their emotions than their EIE duals... I agree with Grigory Reinin that EIE's hysterics are controlled (the Fe subtype's more so than the Ni subtypes.. the Ni subtype is less controlled by outside circumstances but even ****** was controlled in his actions; when he took power there was little to nothing pathological about him, he was the way he was because of how his father treated him); my emotional reactions were poorly structured.. ethical types generally have better self-control over their actions, especially as they effect other people than logical types do. Despite ESI exploding sometimes, it's like they always know beforehand whether they want to kill or punch someone and they tend to make measured decisions and not have any regret later. LSIs, especially the logical subtype with violence, seems less self-controlled as if they're possessed. But SLEs tend to make sure that only the right people are around people when they actually resort to violence... they have higher self-control, and know what the consequences are better than i do.
women seem more decisive and seem to have more self-control and to be more inner-directed than men.