Oxy seems to be very habit forming fro what I can tell from reports here and elsewhere, anything you can snort would likely become an instant issue for me.
I'm pretty sure cocaine was very much of a game changer for me, prior to getting into coke I had the ability to have drugs in the house and not take them for weeks on end.
I've always been more into stims than anything else, mainly due to using drugs to fuel 12 hour outlandish dancing sessions, unlike some I never took anything to take the edge off the comedown, I think the afterglow of MDXX probably helped and then back to work took my mind off how shit I felt, it was more of a way of life week in week out.
A fair few friends started on heroin as a means to cushion the crash from copious amounts of MDXX and inevitably coke and crack.
My experience of opiates has been almost entirely through legitimate prescription medication since my bike accident, MST slow release seems to have very little addiction potential for me, codeine is pleasant and I could see how you I could get into problems with it but the allure is not that strong.
That said despite my state I got significant pleasure from IV morphine whilst in hospital, I had the little green button to press for another dose and they upped the amount and frequency for a bit due to the extent of the surgery.
I could see myself retreating into a drug like heroin quite quickly and forsaking the few things I've managed to hold onto over the years that mean anything to me.
The ideation thing is an odd one that I have recently discussed with my doctor, it seems like a discrete issue of obsession, going back on ADs seemed to just switch it off. I've no view on if I would ever actually attempt suicide and I don't think the ideation necessarily suggests I would be more likely to do so .
Someone posted the other day about suicide attempts being cries for help, it might be true in some cases but for me the whole subject is much more complex and more about choices and available options.
apologies for the ramble