O'Connell has been installed as skipper for the Six Nations in place of Brian O'Driscoll, who misses the entire championship after undergoing shoulder surgery.
Ireland have been led by O'Connell on five occasions and the Munster lock is the automatic selection for the role when O'Driscoll is absent.
While coaches are eager to demystify the importance of captaincy in the modern game, instead promoting the value of 'leadership groups', Ulster winger Trimble insists they remain highly influential.
"Captaincy is still massively important. At Ulster we have Johann Muller and Rory Best. They make the decisions and do the talking,'' Trimble said.
"They're clear and concise, telling us what we need to do, and that's good leadership.
"Other leaders, such as Ruan Pienaar, do the right thing at the right time. He doesn't talk things up, just tends to make the right decision.
"There are different types of leader out there and O'Connell is someone I have a massive amount of respect for. When he speaks, I listen.''
Trimble insists Ireland lose nothing with O'Connell, who was chosen to lead the 2009 Lions tour to South Africa ahead of O'Driscoll, at the helm.
"Paul is great in the dressing room. When he talks everyone else listens.
That's the way it is with Paul,'' he said.
"I look up to him massively and have an enormous amount of respect for him as a leader and a player.
"To a certain extent he goes into a zone, but at the same time he communicates well. He leads well and brings everyone with him.
"Brian is a massive loss, in terms of what he has to say, but more importantly the impact he has on the pitch as well.
"But everyone's fully confident of what Paul brings. There's no better man to replace Brian as a captain.''
O'Driscoll's absence has benefited Trimble as well as O'Connell.
With Keith Earls chosen to deputise for O'Driscoll at outside centre in
Sunday's Six Nations opener against Wales, a vacancy has opened up for Trimble
on the left wing.
Of all Ireland's fringe players at the World Cup, Trimble was the unluckiest not to see more game time and although he featured in all five games, only one was as a starter.
Now that fortune has offered him his chance, the 27-year-old is determined to make the jersey his own.
"In the last six months I feel like I've been playing well, banging on the
door and trying to get starts,'' he said.
"If you get an opportunity but don't take it, then I'll only have myself to
blame. That's why this weekend I want to perform as well as I've been playing for Ulster.
"I definitely want to kick on and I want to be a regular starter.''
The stakes are high on Sunday, for Trimble and Ireland, with victory over an injury-depleted Wales potentially setting the tone for their campaign.
Talk of avenging last autumn's 22-10 World Cup quarter-final defeat by the Welsh has been avoided in public, but Trimble hints that behind the scenes it is felt a score needs to be settled.
"I don't want to read too much into what happened against Wales in the World Cup and Six Nations last year, but there is definitely something more special about this fixture,'' he said.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
$29.99
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.