I was just rewatching the Kid Buu saga where Goku has amped up the spirit bomb, but can't release it because Vegeta was in the way. Why not just kill Vegeta along with Buu and then wish Vegeta back with the dragon balls from Namek? This plot hole annoyed me a decade ago and it annoys me today. I mean Goku realized this shyt (sacrificing yourself and getting wished back) was a good strategy when he fought Raditz, but got overly sentimental for no reason fighting against Kid Buu.