Do you use them?
I use every bomb in the game. This naturally includes blast bombs.

Do you like them?
Yes. Yes I do. If I was to pick one weapon to beat all the content in the game with, it would be Nitronome. There is absolutely nothing you can't solve with Nitronome. Enemy over a short cliff? Nitronome. Surrounded by mecha knights? Nitronome. Fight a boss? Nitronome.

For Vanaduke it may be a bit slow-but-steady, but it's a fairly safe weapon to use. I have it on video!

It's also great for Ironclaw Munitions Factory.

And you can use it to clear the Rocket Puppy Room in FSC.

Nitronome is reliable. It charges fast, it does good knockback, does decent damage, has excellent radius, and no movement penalties when charging. Nitro is a jack of all trades, expert of all them. The other bombs are pretty cool too. I like all the blast bombs, but Nitronome is just so much easier and/or stronger than the rest that they're hard to recommend.

Irontech charges just as fast as Nitronome, but it feels like longer just because of the slow walking speed. Weird how the brain works that way. The slower walkspeed and longer fusetime makes Irontech riskier, but as it has more damage than Nitronome, the DPS is higher. The damage difference is almost equal to having a medium damage bonus for Nitronome.

Big Angry Bomb is interesting. The knockback is insane and cannot be measured in tiles as much as in screen lengths. If you have two bombers stacking BAB with alternate timing, melee enemies will pretty much not be able to touch you at all. I'm not a fan of the long charge time.

Heavy Deconstructor is a good bomb to fight constructs with. I like it in Ironclaw Munitions Factory because it's easier to avoid accidentally triggering switches with the reduced radius. Mine also has CTR low on it so that's handy. I like using it with Mecurial Demo.

How do you use them?
To answer this question I would have to write a book. Generally, a bomb can be used in three ways: Spamming, kiting and timing. Spamming is the default mode for a bomber, as seen by the popularity of CTR over damage bonuses. This is not without reason; CTR increases your damage over time far more than damage bonuses do, and as such you can generally kill things faster by planting as many bombs as fast as possible as you can.

When you spam, you just kind of generally dodge your enemy and attempt to plant the bomb at the same spot over and over while running away from the designated spot and back in again. What this accomplishes is that enemies won't start attacking until just before the bomb explodes. When it does, the enemies will either be blasted out of attack range or interrupted. Often both! Slower enemies often decide for you where blast bombs get planted. You try to plant them so that one bomb will knock the slow enemy into the radius of your next one, ping-ponging them around. This can get pretty disorienting for party members. Darkbrady has a pretty neat method where he places himself in the way of large enemies being blasted around to minimize how much they get blasted around.

Kiting is not as popular with Nitronome as it is with no-knockback and low-knockback bombs. It's very easy to knock enemies into yourself just as they're attacking if you're not careful with it, and as such kiting is sometimes more dangerous than spamming. It generally consists of running away from the enemy and leaving bombs behind you. It can be pulled off safely if you're smart about it and don't run away too fast. This will let the enemy get blasts past you, and you can kite the enemies back and forth. Kiting works well with BAB and Irontech because the combination of slow movement speed, long fuse time and high knockback makes it very easy to blast enemies past you.

Timing is sometimes in order. The easiest example of this is in T3 gun puppies. They have a certain rate of fire, and it's possible to interrupt them if you hit them just before or during their barrage. If you have max CTR and just spam bombs away, the puppies will probably get out some bullets between your bombs and you'll take damage. You can ignore this and just dodge them, or you could delay your bombs a bit so that they explode just in time to interrupt them. Also works for other enemies. I find that timing is the best way to bomb greavers.

Anything special you see in the models (are they pretty at all?)?
Irontech is sexy, but I made Deconstructor as my first blast bomb partially because of how nifty it looked and partially because there was no elemental damage bomb at the time and gun puppies were the only type of turret around, appearing everywhere.

Best monster family to fight with using these?
Fiends are the toughest monster family to fight with using these. They're great for everything else, and even fiends just take a bit of practice.

Do you use them?
Yes, I use my Nitrome in almost every level I go on
?Do you like them?
Absol-lutely! Nitrome has everything a bomber should want, Decent Knockback, damage, radius, charge time, fuse, and The only Normal Damage bomb everyone loves!
How do you use them?
Semi Spamming
Anything special you see in the models (are they pretty at all?)?
Just look into them blast bomb eyes, THERE SO CUTE
Best monster family to fight with using these?
Every monster family is fine to use against with Blast bombs!