Good choice. I always liked Geordi too. Expanding out of TNG and into DS9, I think O'Brien is a good one to aspire to, at least for me. Loyal, almost to a fault, to friends, family and colleagues; highly skilled and experienced; and despite his personal demons and high potential for PTSD resulting from his time during the Cardassian conflict (unlike his former Captain), he still functioned with extreme diligence and professionalism. Definitely a strong role model, IMO. Bonus that he's also someone I'd like to sit down and have a pint or five with.