What NES game was the one you wanted so much to beat but no mater what you could not figure it out?
For me it was King's Quest 5, for months I saved for it and was one of the last NES carts I got as a new release, I tried forever to figure it out but it seemed kinda complicated to me at the time, or maybe it was cause I was too busy going out partying too much to have time for it LOL.
I eventually beat it on an emulator and using an online Walkthru, I know I'm a cheater LOL But I finnaly got my money's worth!!