Thread: хотелось бы посмотреть, кто ей понравился; why perfective past?

P.P.S.
I think it is just subject of memorizing:
ЗАПЛАКАТЬ - "Начать плакать"
ПОПЛАКАТЬ - "Провести некоторое время, плача"

Actually I didn't notice that Летать and лететь are 2 different verbs; I don't know if I understand the difference.
Летал He flew. (there and back, multidirectional
Летел He flew. (but didn't come back, unidirectional)
I think this is going beyond what I understand, I haven't really looked into verbs of motion yet, I'm aware that they treat aspect differently to other Russian verbs.