I really liked Scott Bakula’s Archer. He does a really good job of being authoritative yet friendly with his crew, and a good mix of being level-headed and emotionally driven. Also, I love how Trip and Malcolm relate to each other (“keep your shirt on, Lieutenant.”)
Mayweather and Hoshi are also both great, but I really liked T’Pol better before Trellium mucked with her emotions. I used to think that the uncertainty and breathiness in her late-season-3-through-season-4 dialogue was Jolene Blalock trying to convey that constant emotional battle T’Pol now deals with, but then I discovered Blalock’s Ishta in Stargate SG-1 sounds exactly the same, so I don’t know what to make of it.