I occsaionally use a Summer Special type iwb from a local maker (D.A. Leonard) when using leather but 95% of the time it is a Blackpoint Tactical wing hybrid iwb.
For the money i really like the Blackpoint. It is kydex front and back with 2 leather wings so it has great retention but rides very comfortably. Each wing has 4 adjustment eyelets to set cant to individual preference.