Their controller is the most compatible with PC.

XBox > the controller.

My least favourite is Xbox, but you can't deny that they are S Tier when it comes to backwards compatibility.

Microsoft -> the cloud

Microsoft -> PC support

Since both Xbox SX and PS5 bore me to death, this will be the first time since the 90s for me that I will sit out an entire generation without a console at all, not counting Nintendo. Because of that, I'm very grateful for Microsofts extended PC support, although I never liked them all that much. Neither as a console maker nor as anything else.
Though Sony is also getting there with constant releases for PC which just makes me more confident in my choice of platform for this generation.

Xbox is probably my least favorite rly just bcuz their exclusives arent for me and I dont like their interface and setup that much but the Xbox One (and presumably Series) controllers are top tier and their PC support is unmatched. I also rly enjoy the Halo series

I don't know which is my least liked, I play them all sometimes. I'm just going to say a good thing and a bad thing for all of them if that's ok!

Most Liked:

Nintendo - IP and games, they make some truly special stuff.

Sony - Hardware and single player story games!

Microsoft - gamepass and backwards compatibility support FPS boost is great.

Least liked:

Nintendo - They make really dumb decisions, amazing games, baffling and archaic corporate side.

Sony - backwards compatibility, admittedly ps5 is a step up from PS4. Still could do better. PSNow needs improvent.

Microsoft - Worst exclusive output imo, they have some great stuff still, but bigger gaps in time for games I want to play compared to the other two usually. XCloud streaming is also the worst quality cloud gaming I've used.

My least liked has consistently been Microsoft. I disliked them because they used to be very consumer-unfriendly. They've done a total 180 on that this generation. GamePass is awesome, and the Xbox Series X is very great hardware, in my opinion. 

The company I'm least interested in is Nintendo: the best thing from them = they function in such a way that their existence doesn't bother me and I can ignore it.

Ugh. I hate them all somewhat equally, but judging by the fact PlayStation has always been my main console, let's go with me not hating PlayStation as much. That leaves Microsoft and Nintendo, so I'll pick both. I like Microsoft's (relatively) excellent approach to backwards compatibility. I don't play old games all that much but I do play them occasionally, so I can definitely appreciate what Microsoft is doing. As for Nintendo, what I like is the commitment to creating great games.