Stuff and nonsense, there are tons of comments that can be made about sprite sheets. "Nice choice of background color", "I like the font", and "very orderly spacing!!!!!" are all acceptable responses. You can also feel free to discuss the current weather or start up a debate on religion, both of which are customary topics of conversation in a traditional spritesheet-posting topic.
That aside, here are more sheets.
On a side note, those four Tunnel (jungle) tiles at the bottom of the Super Future tileset do not work in the way that you would expect them to. You'd think that they would extend to the outer walls from the inside. This is not the case; they extend toward the middle of the stage from the outside edges of the screen. See the screenshots for stages 7-2 and 7-4 of the Hidden Bomb Battle Game map for clarity.