Less illegals, less refugees, less terrorists, less taxes, no Obamacare... Those will be good for every American. Their personalities and their pasts are irrelevant. Policy is all that matters
Undocumented residents contribute greatly to our society, including doing many jobs no one else is willing to do and paying into services that they can't take advantage of. Spending billions to deport them benefits nobody. It's a massive expense (and since you want to lower taxes, I'd be interested in how you expect to pay for this), creates tons of empty jobs, destroys families, and creates a massive foster care crisis. Create a realistic path to citizenship and there won't be so many undocumented residents.
The refugee vetting process is thorough already. The unfounded paranoia regarding refugee terrorism (remind me of how many refugee terrorist attacks America has experinced) is just fear-mongering from the right.
Less terorists? Trump will cause an increase in terrorist attacks and is already giving tons of anti-American fodder to terrorist organizations with his anti-Muslim propaganda. He's ISIS's #1 recruiting tool ATM. Moreover, the vast majority of terrorism in this country, whether the purpitrator was black, brown, or white, have been by US citizens. So please explain to me how a president who is constantly fanning the flames of racial hatred will decrease terrorism.
Less taxes? For whom? There are people and corporation in this country who need to being paying more taxes.
As for you're claim that personalities don't matter in a political leader, that's just laughable. Someone who has hissy fit everytime someone calls him out on his bullshit does not have the sort of disposition needed to decide when we do and do not go to war. Moreover, someone who is openly racist against Muslims and Mexicans and indirectly racist against blacks cannot be an effective leader of one the most diverse nations on the planet. Furthermore, he is simply too uneducated on foreign affairs (as his embarassing comments on Ukraine this weekend showed) to do the job. Lastly, it sounds like the leaders of the military have so little respect for him that they might disrupt the chain of command and reject his orders.