To be honest I think half of Killers sucks. Maybe sucks is a strong word but I think five songs are boring at best and irritating at worst (Drifter). I only really like Murders, Wrathchild, Purgatory, Genghis, and Killers. Ides is ok for what it is. Di'Anno's voice is one of the biggest reasons I don't like it, he was good on the first album but he wore out his welcome after one.
I also think half of NOTB is just ok. Invaders, Total Eclipse, Gangland, and NOTB are decent. Run to the Hills can be fun. The rest is great.