Ah, a pointless memorable sidestory:
...yes, i didn't know the sweet-scent/repel trick by then. I was simply just "grassing" Route 38 nonstop until I finally found him. Gen 2... I still love you. I will. Forever.
Anyway, no. I never really liked it. However, it was still undeniably pretty awesome to randomly encounter that legendary pokemon. I always get that feeling that I was really lucky to even see them. Wish same could be said for Genesect, Meloetta and the rest. I wouldn't really mind if they were roaming. Remove the sweet scent/repel trick to make it a bit more thrilling experience.