What ball company is your favorite currently and why?

I like Storm.  I was a big C300 fan when my brother ran a pro shop and could give me a discount.  I tried a few Roto Grips and loved them.  Started working in a pro shop and became their Storm/Roto rep.   I migrated from the Roto to Storm and bought a lot of Storm balls.  Became a Silver level coach and learned more about my game.  Lost my rep status when I moved out of state, but kept with the Storm line because they kept making great balls.  I like to stick with one brand, because having multiple brands to keep up with is difficult.  One brands weak ball, may be another brands medium ball.  So I keep to one brand.

the brand that works

 
That's kind of my attitude also.
 
Still, I'm a ball whore and I have arsenals across Columbia, Storm, and Radical that are more complete than those owned by many single manufacturer fanboys. I also throw current releases from Hammer, Brunswick and DV8. I have older Motiv and Lane#1 balls that I keep more for nostalgia and practice than anything else.   
 
If I "had" to pick just manufacturer at this point, it would probably be Radical. They cover the higher end better than any other company. Their mid and lower end offering are more than adequate. Brunswick poured balls have always been very durable, and Radical is no exception. It's really a shame the company doesn't get more exposure. 

For obvious reasons, Brunswick (and Radical) are best for me.  They have been very versatile as well as durable.

Having said that, I do live in Utah so I'm always helping people with their Storm poured equipment and it's good stuff.  Just routine maintenance on all of today's equipment seems to be the key to optimum performance and durability.

Visionary

Have tons of VBP's stuff, rolls great for me, hold up well (coverstocks) and I have yet to see a single VBP ball crack.

Back about 15 years ago the ball of choice was anything Columbia poured. I loved the AMF Angle Evolutions, Rocks, and the entire Track lines. For whatever reason, their stuff just matched me like VBP matches up great for me today.

Never matched well with Storm with anything and the only Ebonite stuff that got along with me was the Original Apex and the Vicious Particle from Hammer after the buyout from Faball.   Outside of the HPD from Brunswick......pretty much the same boat as Storm and Ebo.

Haven't really tried Motiv outside of a few here and there a couple of years ago....I did have the Venom Shock and wow was that a nice piece!

Track has been filling my bag now for the last several years.  Currently in my bag are Track Heat when I see enough oil, Track Tundra for normal house shots and 300C pearl for the lighter shots.

Mark

Roto grip. Typically before 2016 made a complete lineup with the least amount of balls. 

I fill a lot of gaps with their stuff.

I was a loyal Storm follower from 2001 starting with the Trauma Series, this was after a 2 year lay-off (1999-2001).  In 2007 I was introduced  to the Lane Masters Original Black Pearl and was sold immediately.   I've been throwing Lane Masters and a few Lord Field balls since.