Although my favourite show was DS9, I wouldn't want an 8th season of it. I think it came nicely to an end and a further season would be downhill. I am torn between TOS 4 (more of the original, iconic characters) and Prodigy 3 (which, I think, of all the new Trek, provides the best balance of "feeling" like Trek yet doing something new). On balance, I will opt for Prodigy 3 as there is less Prodigy than TOS.
Choosing a season to go is a lot harder, mainly because there's more choice. Ideally, I'd like to shed two half seasons (1st half of Discovery 1 and second half of Discovery 2). As the second half of D1 and first half of D2 run consecutively surely they could count as a season? Hmm, thought not. So it's Discovery 2 that gets the chop.