For me, I enjoy wearing them.. I love the feeling for using them (#1 only, though). Especially for the very thick ones, such as Abena X-plus, where I can use it 3 or 4 times and not worry about leaking (I started on depends, and did so for a very long time. So it's almost second nature for me to check for leaks but now I finally trust the diaper that I wear, which leads into the next point)
Diapers at first were just an extension of my wetting fetish (I still partake in that one, as well) but after a while it became a security thing as well. Although when I used depends I couldn't rely on them enough and I was more worried about leaks then.. but since I started ordering Abena X-plus it really has become a security and comforting thing to have one on. I don't typically wear in public, just because I'm a poor college student and seldom indulge myself enough just at my apartment.. But I do enjoy wearing in public as well, it's exciting for me to have that concealed. All of my friends know about my fetish too, and I've told them every detail about it.. And of course it was awkward but I asked if they minded at all if I did those kind of things around them (concealed of course, I wouldn't just go wearing only a diaper around our apartment just as much as I wouldn't go in public masturbating). Luckily I've surrounded myself with very open minded people my entire life, and they don't care at all. Being yourself in this respect with people and being accepted is a wonderful feeling.
I'm not sure if anybody can relate for this, but probably the biggest turn on for me if I were to have a female partner accepting of this trait of mine would be the immense amount of mutual trust I would have with this person. Sure I have personal things to talk about.. but this one thing about myself is always the last thing I divulge.. And I have on numerous occasions with past girlfriends. They've all been accepting of it, we all parted ways for other reasons.. But the level of understanding they showed made me trust them far more than I could trust anybody were I not to tell them.. because they know about one of my most guarded secrets, and when I let that secret out is when I'm at my most vulnerable.. So back to the security again. I've never asked a girl to partake in it with me, nor will I ever. I put it out there that I would enjoy it, but it's not necessary. I don't think it would be right to ask that kind of thing and put somebody under that kind of pressure when it's not necessary. (For me my fetish is very strong, but I've been in relationships before where I would tell her about it and she would accept it and assure me her feelings haven't changed but she didn't feel comfortable doing it, but I was quite happy for how long it did last.. I know I don't need somebody to indulge me with diapers for me to be happy)
Kinda ran some tangents there so here's a summary.
I like peeing myself/seeing girls pee themselves... recently this has shifted to doing so with diapers.. which caused me to develop a taste for all the things associated with diapers (the feel of them, how exciting it is to conceal them, wetting them, and the level of security/comfort I feel when wearing one)
And since a common theme for this upstart board has been how we differentiate from AB. I'll say that while the feeling of security diapers promote for many of us can be considered emotionally regressive (feeling a dependence on something.) I personally don't believe it is, because a feeling of security can be brought about by many behaviors which are NOT considered regressive in any way (for example, a lot of people will use blankets in bed even though it's warm, and will blatantly say it makes them feel secure) I love wearing diapers, I love just about everything associated with them now, without extending into infantalism.