I'm actually not sure where I stand on this. I'm sure I've heard Soleimani's name in the past, but it never stuck, so I really know nothing about anything he has done previous to his death. I think I can be reasonably sure that Trump didn't know much about him either, and that this all came about via advisors.
Maybe it's a good thing to have done, maybe not. I can't help but think there will be many retaliatory acts by either Iran, their surrogates, or just amateur pro-Iranian goat herders looking for "vengeance".
EDIT: I'll also add - I wonder if it wouldn't have been better for this guy to die of a "heart attack" versus the high profile blowing up thing. Just seems like there's a high potential for martyr status.