Disclosed herein is a personal care conditioning and/or styling composition for keratin substrate comprising: (A) at least one conditioning and/or styling copolymer obtained from polymerizing: (i) about 0.1 wt. % to 99.9 wt. % of at least one cationic or pseudo-cationic monomer selected from the group consisting of acrylamidopropyl trimethylammonium chloride (APT AC) and/or diallyl dimethyl ammonium chloride (DADMAC); and (ii) about 0.1 wt. % to 99.9 wt. % of at least one monomer comprising at least one functionalized or unfunctionalized acryloyl moiety and at least one lactam moiety; (B) at least one cosmetically acceptable excipient; and (C) optionally, at least one effective amount of personal care active ingredient. Also disclose is a process for preparing such composition and method of use thereof.