Ok so I am not very good with builds, but i was wondering if someone had a sort of build where every attack would have something to do with an explosion or something blowing up??
If any one has a viable build like this please post or comment. Just thought it would be cool/fun to go around everywhere and blow stuff up!!!

Not unless there's a grenade launcher power replacer.

Off the top of my head:

Frag Grenade
Rocket Launcher
Explosive Arrow
Sonice Device
Force and TK Eruptions
Pyre (kind of)
Fireball

Besides what mirth81 listed:-

Micro Munitions and Shoulder Launcher from Power Armor are both rocket powers. Micro Munitions is excellent, Shoulder Launcher is kinda ennh.

Micro Munitions is an excellent power, but Shoulder Launcher is actually a pretty poor attack because it has a 5 second animation delay before doing damage. That said, it looks awesome. If you take both, you can run both toggles at the same time...though there are better options for Shoulder Launcher's slot (like Mini Gun).

Mini Mines from Munitions throws out a bunch of mines around you; they explode if an enemy gets near. I have no experience with this power, though. Particle Mine from Gadgeteering is similar.

If pure ROCKET ACTION is your aim, then Micro Munitions, Shoulder Launcher (Power Armor) and Rocket (from Munitions) are the only literal rocket powers in the game.

I would personally suggest a Power Armor build to make use of Micro Munitions, since it seems the closest to what you want - a long endless stream of missiles flying everywhere and many many explosions for as long as you run the toggle. That does leave the question of what ELSE to take, though.

Full out Power Armor is good, but Force and Fire stuff could work too.

Now this build WILL be an energy crisis BUT its almost all explosives in one form or another... i'd say color the force powers red and use the tech bow for the archery ones. You'll need to tap forth sheath (as soon as you get it) often and just keep killing!
: Level 40 Champion

Superstats:
Level 5: Super Intelligence
Level 13: Super Recovery

Powers:
Level 1: Wrist Bolter
Level 1: Force Blast
Level 5: Force Eruption -- Gravitational Polarity, Rank 2
Level 5: Flight -- Rank 2, Rank 3
Level 8: Quarry -- Rank 2, Fair Game
Level 11: Particle Mine -- Ejector Module
Level 14: Sonic Arrow -- Deadly Dissonance
Level 17: Micro Munitions -- Rank 2, Rank 3
Level 20: Rocket -- Rank 2, Concussive Rocket
Level 23: Force Shield -- Force Sheath
Level 26: Explosive Arrow -- Rank 2, Rank 3
Level 29: Shoulder Launcher -- Bunker Buster
Level 32: Fireball -- Rank 2
Level 35: Force Cascade -- Rank 2
Level 35: Teleport -- Rank 2
Level 38: Mini Mines -- Wall Of Fire

Talents:
Level 1: Mechanized
Level 6: Brilliant
Level 9: Tireless
Level 12: Amazing Stamina
Level 15: Negotiator
Level 18: Investigator
Level 21: Quick Recovery

rocketlauncher and frag grenade have similar short cooldowns, so you could have a build toggling between the two, perhaps throw in aspect of the infernal since you'll be chucking explosive knockbacks around everywhere :)

also throw in particle mine with the advantage for more BOOM :D

You could make some minor mods to 9dguy's build for more energy.

DEX/INT with Killer Instinct, Form of the Unleashed Tempest. Mini Mines, Rocket (and Frag Grenade) should set off killer instinct on crits. You'll lose some opening energy compared to SS REC, but I remember someone saying Mini Mines worked really well with Killer Instinct.

Thanks guys thats all really helpful!

You can't make this build and not get the gadget T4 - implosion engine bomb of doom!

I have a build similar to this -

Frag grenade and Rocket Launcher

While waiting on cooldowns -

Micromunitions and Shoulder Rocket.

Pretty much blowing everything up constantly, and knocking everyting off it's feet left and right.

I found minimines and particle mine and sonic device also fun to use and quite explosive.

Its a fun build :D