I think I got through 50 episodes of the original Naruto and lost interest. Anime just doesn't entertain me personally =)
Heh .. Naruto isn't exactly one of the best anime to try and get interested into anime. It has way to many filler. If you want to give anime a real go, it's better to search for something that not only sounds interesting to you, but also has a lower number of episodes. So that way you are less likely to get bored or lose interest.
A lot of people always assume Naruto, Dragon Ball Z, Pokemon, Bleach and anything else that tends to appear on American TV some how represent anime. Truth of the matter is, most of the anime that pops up on basic channels are less mature anime that really doesn't have any of complicated stories and is easy for teenagers to get into. The only way you will ever get to see any really really good anime on TV is if you have the Funimation channel or anime network channel. But even then it's hard to get into since your are unlikely to ever catch an anime on the first episode.
I am sort of curious though .. why did you even bother going through 50 episodes of something that didn't entertain you? Sounds more like it entertained you at first, but simply lost interest later on.
I suggest if you like strategic, intelligent, and suspense. Try out Death Note.
If you like action and adventure, Full Metal Alchemist is always a pretty good anime to start on. Though I personally recommend Full Metal Alchemist: Brotherhood ... it's better in my opinion.
If you like action and comedy Trigun is fantastic, though it does sort of get a bit serious and very dramatic toward the end.
In other words, mostly anyone can find an anime they would enjoy, as long as you don't mind the art style. It's no different then show or movies. Except ... Anime tends to have more ... unique stories compared to the west.
Naruto my absolute face! The rest you list i never heard of or seen
