it depends on my jig weight and the distance I am trying to achieve and whether or not I am using a float .
I love my 6 foot Tica without a float long distance casting and or with a float real tight to the jig 2 to 3 foot deep with a light jig
I love my 7 foot Tica with a float long distance casting at about a 4 to 5 foot depth or so with a light jig .
I love my 7 and 8 foot old prototypes ( not listed ) for larger jigs and floats set in the 6 to 7 foot deep range .
I rarely go over the 8 foot mark when casting on my rod lengths .
eyelet sizes ,line weight and reel sizes have alot of play in my mind as well , to cast well its a mix of attributes that get it done .