Oh my gosh o my gosh xD im like a little girl right now X3 jajajaja juts kidding
well for a bloodline jutsu i would go for byakugan, eyes behind my back 360 degrees view and it can be used like x ray vision YEAHH RULES so i think it can work like sharingan since sharingan descends from it, i mean in the part of seeing opponents moves more slowly. I dould be even ultimate bank robber just wait and see across people digits pressing the secret code in the vault.
and for a normal justu i would go with a more functional justu, coz the thread creator meant, as i see it like using that jutsu or bloodline in the normal live, you dont go fighting in real live like a ninja. so i would go with kage bunshin, really helpful, i would have infinite knowledge in seconds i sleep while my kage clones studies instead of me so when they puff out all that they learn goes to me. YEAH DUDE THAT ROCKS!!!