ok, i suck at explaining, so bear with me here...
1.they don't necessarily act like kids as much when around each other... for shinichi and ran... its like they are kids and have a crush on each other, but don't really understand each other the way conan and ai understand each other...
2.Ran and Shinichi always fight since they don't really have any shared intrests... conan and ai share an interest in soccer (to different degrees tho... also there is more but i can't explain... i have bad explanation skills... TT.TT)
3.Even if its not a logical reason.... its a reason
4.Ai provides more help that conan needs than Ran does. Ran doesn't exactly understand shinichi when he says he's busy, she only gets mad at him when she should realize that he doesn't live for her. Ai is able to provide help on cases and her strange sense of humor can pull him out of any negative times, even if all it does is baffle him it removes the negativeness and brings him back to a neutral state for the time being
5.not necessarily a dead body... in any sort of dangerous situation.. as long as it doesnt involve the black org, she is much more mature. Ran freaks out in every little situation...which can be very troublesome
6.by closer relationship, i know they arent exactly intimate or anything, but they definitely understand more about each other than what ran and shinichi understand about each other...
7.not just that, even if Ran was told everything, i still think ai would understand conan better. If he were to give both Ran and ai a signal trying to convey the fact that he was about to shoot Mouri with his wristwatch, Ai would probably understand it better than Ran, even if he had never shown either of them the sign. ai understands all of the different expressions on his face, but Ran doesnt really seem to understand him
8.Ran would give help, but i don't think that she is able to give intellectual help that would help solve the case. She would only be able to do the physical parts.
9.of course i can't deny that, but feelings aren't set in stone. besides, i'm making this list, knowing that Ran and Shinichi will probably be together, but that doesn't mean i want it to happen, I'm all for ShihoxShinichi.
10.love is nothing definite, feelings change, and i think it's possible for his feelings to change, it just might take a while
11.this was added on as a joke... but it looks like it was taken seriously... but damsel and knight usually go together, but i just dont think that works for shinichi and Ran... anyways... disregard this number i guess, i was originally only doin 10.. then i just felt like adding this one in...
12.
13.ok, so this story is sort of modeled after sherlock holmes and such. in sherlock holmes, the only woman he ever loved was irene adler, the only woman who could outsmart him. in detective conan, ai is probably the only woman who could outsmart conan, she sometimes figures stuff out before conan and leaves hints for him to follow
14.i know what you mean, but i can still think of it like that, sometimes i read too far into things, but its not like its completely unlikely that its true...
ok well yeah, think of 12 and i'll respond the best i can to that too, sorry my explanations suck, i don't know how to explain some of the stuff i want to...