According to my A-P profile am near 620 watched, i'd assume around half of them are because of AMVs. I don't usually go around looking for animes to watch....they land at me via media such as AMVs, or discussions from people on forums i use.
Most recently was Toaru Hikuushi e no Tsuioku, because of this
Or from a long time ago, started Naruto because of this
...kind of wish i never did watch this AMV