I wouldn't miss a thing if they bought Valve... but as some said if they brought Steam to Xbox then that could make they a lot more competitive against Sony.

How would it make it more competitive when they'll gut the Steam store, mod support and all?.

It shouldn't even be about competing with Sony in the PC space, since Sony isn't knee deep in that market like Valve is for example. MS only has it's toe in the water at this point. 

How would MS be more competitive against Sony if they had Steam on Xbox? By having more options and the merging with their play anywhere could make they quite competitive.

And I wasn't talking about Sony on PC Space, I was talking about Console space.

Remember me to ignore you for any future financial discussions.

Only the Valve IPs I don't play xD 

Just Valve as far as second and third party developers goes, because there's something unique about the way they develop their IP that makes it almost impossible for another company to pick them up and maintain the Valve standard.

TF2/Dota 2/CS:GO - All have cosmetic-driven funding models that allows continued development. MS would be sorely tempted to introduce pay-to-win I imagine. The latter two also have very healthy and enormous community-supported pro scenes that were only possible because of Valve's hands-off approach and grew organically. If MS took over I've no doubt they'd handle them to be more like the LoL or StarCraft pro scenes, which is not something either community would be happy with.

There's something very personal and personable about the Dota 2 pro scene (possibly the same for CS:GO but I'm not as familiar with that scene) - it's highly community driven, from the development lead (one of the original Dota developers), to the updates (Valve clearly uses r/Dota2 to sound out fixes and updates to the game, reacting to reasonable community backlashes quite quickly), to the personalities (casters, hosts, and so on have almost all risen up through the community, rather than being imposed from above), to the prize pools with tens of millions being raised each year by players purchasing cosmetics. 

Half-Life - Even Valve obviously doesn't think it can deliver a game worthy of the Half-Life name, that's why there's been no third entry. Anyone buying Valve or the IP will almost certainly have to use the IP to cover such a major investment. It won't deliver, and a game that doesn't deliver is worse than no game at all.

Portal - I can't think of a developer that delivers the sort of witty dialogue that's synonymous with Portal, let alone a developer within MS's limited stable. Again, I'd rather the franchise went dormant than received a lacklustre entry.

L4D - Probably the one Valve IP which, although I really enjoy it, could be taken on and made just as well by another developer as it has been by Valve. No issues with this one.

Steam - I mean everyone knows that MS's approach to PC storefront has been useless, it's part of the reason Steam has come to dominate the digital PC marketplace. If MS took it over and made only the most modest changes so that users didn't really notice any change of ownership that'd be fine, but there's no guarantee of that at all. Now Steam is far from perfect, and could certainly be improved, but I've seen nothing in Microsoft's own past that shows it's up to the task of doing so.

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I think, for the health of the Xbox brand in general, it is important for MS to start splashing some cash. Buying a few small-to-medium sized developers, or one large publisher, is something I'd be happy to see, so long as they were then actually let loose to make games and not just vaporware. Xbox sorely needs exclusives to remain competitive for the rest of this gen and perhaps more importantly next gen, and strong competition is the best way to keep Sony (primarily) and Nintendo (secondarily) on their toes.

I just don't want Valve to be the company MS buys xD

Well not with there straight out cash. I am sure if they really wanted to they could easily make room for the Purchase by simply selling and trading.

They wont though because is buying Sony worth it? Will they make $150b back any time soon just to stop there competition? MS make money off Sony since they partner up with PCs etc. And it wouldnt help MS tackle there real competitor Apple by using all there cash on a company that isnt garenteed or stable to profit yearly.

They wouldn't for other reasons beyond money, such as the Japanese Government. Just looking at EA's earnings, however, this entire discussion has just gone into silly overdrive. It's not happening. Like I said, I can see Microsoft doing something with the PUBG team, but nothing beyond.