Here is texas I target bass for a good portion of my fishing time and my rod of choice is a 4wt. as for flies I use clousers tied in 6-8's, bendbacks to size 4, and my favorite is a bunny shad pattern that I through togther using size 4 long shank light wire bait hook (debarbed) chenile under body (your choice of color, I like olive) a zonker strip tied in just ahead of the hook bend for a tail (length to match local bait fish) then palmer the excess zonker forward. tie off build up a smooth tapered head and whip finish and cement. the rabbit strip will allow this fly to sink at a slow rate and the fly can be worked easily throughout the water column.
this is a link to my report on a 6lb bass caught on a 4wt 9-15-07
using the the fly described here

http://www.texasflyreport.com/forums...aspx?id=105131

txfly