What shooters that can't really stand up to critical scrutiny do you like nonetheless (or perhaps even because of their flaws)? And what do you like about them?
Some of mine:
Gun Frontier
Flaws:
- painfully slow player ship
- imbalanced scoring
- stupid rank system that is tied to your rate of fire
- difficult to recover from deaths
- annoying final boss "duel"
Why I still like it:
- brilliant atmosphere of decay and nostalgia transported through the graphics and particularly the soundtrack
- really cool design concepts (flying guns)
- the many ideas it contributed to Battle Garegga (bomb system, scoring secrets, parts destruction, flamingos

BlaZeon
Flaws:
- painfully slow player ships, except for one that is stupidly fast
- clunky, big-ass player sprites with retarded hitboxes
- painfully slow and boring stages with pretty much nonexistent level-design
- on the other hand, brutal and fast bosses that are difficult to practice (especially when you need to keep playing through the stages to reach them again)
- SNES version has 30-40 second stretches where literally nothing happens at all
Why I still like it:
- Superb soundtrack!
- pretty good Irem-style graphics
- some of the bosses are really cool and fun to fight
- arcade version has a very nice animated attract mode
- SNES version has 30-40 second stretches where literally nothing happens at all —> it's quite convenient to take a bathroom break or pour yourself another beer or just to chill and listen to the game's music
