Touhou games are my favorite bullet-hells, but they're so dang hard to play sometimes. Now a days all are play are FPS' .... so naming a shooting game that's NOT FPS is incredibly ridiculous to me.
i think he means side/vertical scrolling shooting games...... anyway mine would be the Touhou Project games with I think Perfect Cherry Blossom being my favourite.....since it was my first normal mode is hard enough to beat without using continues for me, let alone attempting hard or lunatic The fighting game spin-offs are fun too!
Parodius is my all time favourite side scrolling shooter, Contra and Pop n Twinbee for the Snes were also great - Games like Ikaruga and 1942, whilst great, are simply too hard for the likes of mere mortals like me