1x every day is more than enough to cause dependancy in the great majority of people... let's not forget this is a harm reduction site, not saying you were telling anyone that it's a good idea to use that regimine though, it's far more likely than not to end in dependancy, in fact your the only person I've heard that can take kratom everyday and not get hooked....consider yourself very lucky. I took kratom once daily for around a month and that caused started my dependancy. As a rule, it would be best to stick to the 2-3x a week with at least 2 days in between doses,1 occasionally.
I would agree, the withdrawals aren't too bad. However, let's not throw away the fact that mycophile has trouble with caffeine withdrawal though, kratom withdrawal is definately worse than coffee withdrawal. Also, there seem to be a quite a few who just get nasty withdrawals from kratom so ymmv. I would try your best to avoid dependancy if you really don't want to have the possibility of dealing with harsh withdrawals, though IME I find the benefits of daily use to far outweigh the week of uncomfort . I don't have time to respond to your PM's tonight but I promise I'll get back to you tommorow... In reality though at some point your gonna have to do some reading and make your own decision, only you know your limits, I will say though that the more I talk to you the more you seem to doubt yourself...maybe it would be best in the end if you just don't go there, that's a decision only you can make. If used correctly though it can really give you a motivational push.
Ps. To clarify plain leaf causes little to no resp depression, strong extracts have potential though (I don't think I ever said it causes zero resp depression as if it were set in stone, just VERY insignificant to the point I've never even had problems mixing kratom with high doses of benzos....it's quite fascinating), you don't have to worry about kratom affecting any of your medications though, that's for sure...especially if your tolerant.... Also there are stimulant alkaloids in EVERY strain, it's just the different ratios that make up the strains character of effects.
PPS. Your not gonna find access to many usefull studies for the great majority of the questions you ask. Just studies on how it's used to wean people off other drugs, it's metabolic process, an case reports of that stupid o-DT laced 'krypton' kratom that hit the headshops. I tried looking for you, I think this site has about as big a list that you'll find publically...read them closely, there's one that titles the article to make it seem like kratom caused a death but if you read the person had like morphine and amphetamines and other shit in his system

. Your gonna have to go on personal experiences, the small 2-3 (iirc) cases of liver problems, and the fact that there have been no deaths attributed to kratom solely.
https://www.dmt-nexus.me/forum/default.aspx?g=posts&m=488576