Having failed with a suicide attempt and on several other occasions been seriously considering it as an option, all I will say is that from my own experiences, is that I've always been clear about what I've been thinking, I've gone through all the outcomes, who'd be hurt, why and how they'd cope. The times I've considered it, it's been hurting one or two people that has utimately pulled me back. The time I failed, I was so far gone, that I felt hurting my friends for a period was worth more than my life. I wasn't successful, have never been, but I was young and popular (or I seem to think I was), and had gone about life as normal up to the attempt. No one till then knew I was "THAT down".
For what ever reason though, today a well respected, much liked sportsman has killed himself, leaving family, friends and colleagues deeply shocked. It's inapropriate for us to be speculating on the reasons why, there are many reasons as to why he might have done this. Till the subsequent inquest results are published if indeed they are (we really don't need to see them, they should be for the family alone), it would be insensitive to speculate the reasons.