which taiji style is best suited for fighting?

Teacher makes the difference, not the style. Styles were all used for fighting when they were invented. •••• became water down over time with teachers who did not emphasize the combative aspects.
Jake

Sun Style.

I am starting to think that Chen style is the one. I practice Yang and Chen Pan Ling styles. I love both styles(prefer Chen Pan Ling).

However, I have seen alot of great chen style applications on youtube lately...

"Styles were all used for fighting" Not really, styles specialize in some from or the other in martial arts and exercise.

"Teacher makes the difference, not the style." or "It depends on the practitioner of the style." What is the difference they are making and can you absorb it without having to have to study from them?

If your teaher knows how to fight and has experience fighting you may or may not learn how to fight from him, depending on his ability to transmit the information (teacher making a difference) and your own ability to absorb and practice (dependence on the practitioner). The potential for learning how to fight will be there.

If your teacher doesn't know how to fight, you, as a student, have no chance of learning how to fight no matter how hard you practice.

That's always been my personal experience. When I first started out in martial arts when I was 12, I learned this self-defense-American-Karate style. Technique-wise and principle-wise, it was seriously lacking. However, there was one thing I really appreciated about it, and that was the fact that I got to spar once a week. I, at least, got to learn proper timing, distancing, and the ability to coordinate with an opponent. However, I rarely ever get to spar now and haven't for a few years.

This has severly limited my ability to fight, even though technique-wise and principle-wise, I probably understand better. It's too bad that I don't have any training partners, and I can't afford to drive down to Tim's.

Maybe since I am now working as a security guard at an apartment complex, it will give me some real life experience...that was sarcasm btw.

i think Troy's right:

the Tai Chi style where they do lots of conditioning and spar EVERY class is probably the best one for fighting skill development.

you know the Tai Chi school I am talking about? The one that does that?