I think suicide can not have positive connotation. I see suicide is mostly done because person wants to exit something negative. They might want to put on end physical misery. They might know they will die with painfull illnesses or they don't want to live old with memory problems and so on. And then there are depression and other mental illnesses aswell. Some might not identify themselves ill but they are sick of living or bored by it. I don't think there are many people who decided to kill themselves just because they had all so good at that moment (and then they would maybe be fleeing from the future when things won't be that well anymore, idk). So suicide stands for some sort of misery on someone's life that only "good" side you can find from it is that "hopefully they are not suffering anymore" and I don't think it is positive enough itself. It just means the end of the suffering, non existent because I don't believe in life after death. Some might find comfort from idea like that. But what I'm trying to say with my poor English that the act itself is not that positive, it is just an escape from a bad life.
Death itself is not pretty either. People don't naturally look like Sleeping Beaty after they're died. It is our mind who likes to think that they're resting, sleeping forever. Dead body looks aversive. That impact is negative unless you have some stuff wired wrong in your brain.
And then there are people who are left behind. Who grief for losing someone important. They might also struggle with the idea how much that person had suffered that they decided to kill themselves. They might be more close to see why people suffer, what is wrong with society or more likely with people and there is nothing they can do to fix it or bring that person back. They're perhaps left with that information but what can they do? They most likely continue living with heavier burden than they already had.
I think person has right to die if they want. Some people can think it is something honorable or even cool. Itsks a lot to really kill yourself so respect people who managed to do it. If you think how much it asks from a person really pull it throught. But I don't think that too many people actually think it that way. They might have some sort of cartoonish picture in their mind and think it is cool or something else. But if they really could have possibility to look closer to someone's life, they would start to feel sorry for the reasons they want to die. They would want to help to fix it and doesn't want to accept if it is something unfixable. And when they finally face the scene of suicide, atleast then they would see it is not something cool. It is something very sad and might make you feel "things are not okay" or sick. In that cartoonish picture you don't feel those deep feelings.