I've been wearing bras for about 2 years, when during a long road trip my boobs hurt so much I had to talk to my wife about it. She promptly went to Walmart and came back with a selection of items. Since then I've done a lot of experimentation.
My problem is that my boobs are not very large (measure at 40B+ but regardless don't fill a conventional B cup) but incredibly sensitive. Abrasion is always an issue, they need support to prevent the very annoying stretching feeling which is frequently painful, and (somewhat contradictory) sometimes the "girls" hurt because they feel like they've been smooshed too much.
So my objectives are 1) comfort, 2) concealment, and 3) cheap. I've tried the camisole-type garments and have found that, unless they have a shelf bra, the garment moves with the body and not the boobs, so do not help with abrasion at all. (However, I do have a few camis that I use occasionally in the probably mistaken belief that they are less noticeable by the TSA....but that's a whole other issue.) I don't fit structured bras very well, it's hard to find reasonably priced 40A's, and I don't like the quite noticeable hardware anyway. So sports bra-type garments are what I focus on.
I am usually wearing a bra of this type, even to bed: a very light pullover thing by Barely There which does not provide much support at all but prevents abrasion (these are getting hard to find, though). During the day, I usually use a Danskin bra (sold in 2-packs at Walmart) that is pretty light but provides sufficient support and abrasion resistance for most days. Sometimes I feel like I want them held more firmly and use a regular Champion sports bra (current favorite is the "double dry shiny seamless" model which has a lot of stretch in both directions). But also sometimes they're just tired of being smooshed (seems to be the case a lot recently for some reason) and I would just like them "held." This is where the Genie bra seemed to fill the bill...it fit well, with just the right amount of support without too much pressure. And as I said elsewhere, it feels even better if you use the pads that come with it, but you have to be ok with the increased projection.
I know it seems like large collection to maintain, but different circumstances demand different responses. Also, I have a hell of a lot fewer bras than my wife has pairs of shoes.
Sorry for the dissertation, but I thought I might save somebody some time and money by sharing this. Hope it helps. BTW, the vast majority of guys on this board are cool to try so hard to help others, especially the young guys for whom this condition is an all-consuming curse. So props to you (and especially to Merle who started it all).