Consoles:
Atari Lynx
Neo Geo Pocket Color
Master System - I don't care much for the library.
Xbox One - Raiden V and Cuphead are the only games that interest me, but even then, they're also on PC.
PS Vita - I considered getting one, but I changed my mind due to the proprietary memory cards and their high cost.
Games:
Most PS3 or PS4 exclusives - I don't have either system. Only PS3 exclusives that I played were Ridge Racer 7 & Playstation All-Stars Battle Royale. Only PS4 exclusive I played was Killzone Shadow Fall.
Most of the Final Fantasy series - I only played the NES and PS1 versions of FF1, and the DS Remake of FF3.
Resident Evil 2, 3, and 0 - Only classic-style RE games I played were Code Veronica and the GC remake of 1. I'm not a very big fan of classic-style RE in general.
Most of the Dragon Quest series - Aside from the NES version of DQ I and one of the spinoff titles (DQ Monsters II on the GBC I think?), I haven't played the rest of the series.
Devil May Cry 3, 4, and the reboot - I already have 3, but I'm planning to finish DMC 2 first before starting the third game. I don't have DMC 4 or the reboot yet.
Most of the Deadrising series aside from the first game
Any of the Tales games - Haven't really decided which game in the series to start out with.
Most of the 3DS library - I don't have a 3DS. Only 3DS games I played were Kid Icarus Uprising and DOA dimensions.
Most of the Metal Gear games - Aside from the NES version of the 1st game and Twin Snakes, I haven't played any of the other games yet.