Yep
Nimzo Indian or Semi Slav for Repertoire Choice?
I know it would transpose to a qgd or a Catalan, so I am having second thoughts
Well, there is this sharp line you can play against the Catalan:
Then against Nc3 you can play the Vienna Variation with dxc4:
@flyingbishop97 if you played just the Nimzo, and not the Semi-Slav, what would you play against 3.Nf3 ? Presumably 3...d5 ?
You can still transpose to NID from Ragozin...I'll have to look up the moves...I forget
Problem with the Ragozin is that the OP doesn't want lines leading to 'boring' chess, hence why I recommended the Vienna instead.
LoL
You don't always get what you want.
A draw for Black is good in my book.
Indeed this is my principle, and I always recommend the QGD. However some people always insist on dynamic chess, and to each their own.
I haven’t really considered it, but Tal played it so....good I guess
I would say that's your most realistic option then, given that the Nimzo and Semi-Slav options have a very large amount of theory you need to learn. The Benoni still has a fair bit in the critical lines, but I think it's more realistic.

Any of these opening are acceptable at Super GM level... which feels best, which do you enjoy, feel comfortable with?
Both nimzo and semi slav can be avoided... so you need a plan b as well.
Sound like you would enjoy KID... but that can hurt...
as black i play only sicilian with whatever variation or indian game with semi-slav or czech-slav variation

Nimzo-Indian. It is a good opening to play for a win with black. After you have a good structure and then you blokced the position like Nimzowith would do then you can take over the iniatiatief and you can go for a win. And you take controle over e4 and often his bishops are blocked behind his own pawns. In the closed position your Knights are strong. The semi Slav is solid but far more drawish to me.

The Nimzo provides a clear strategy - double White's pawns on the c-file and then attack them. You get dynamic piece play (no trapped LSB as in the Semi-Slav) but often cede the centre to White - as Magnuts said, comes down to your style of play preferences
I'm not so sure about the "double white's pawns and attack them" stuff. The point of Bb4 as I understand it is to prevent white, at least at the time being, from playing e4, and then play in the centre with moves like c5 and d5. A lot of the time when the bishop on b4 has done its job it is retreated to e7 or d6.
There are a couple of problems with this plan of trying to induce doubled pawns. If black ever plays d5 then white plays cxd5 and now has a strong structure. If black doesn't play d5 the doubled pawns on the c-file actually control a lot of central squares and are hard to attack.
In the Hubner Variation black does take on c3, but it's not to give white doubled pawns, but rather to trade off the dark squared bishop and then set up a dark squared blockade.
I'm curious whether you actually have a source - is there a book where you read that in the Nimzo black attacks the doubled c-pawns, or do you have GM game examples of this strategy? Otherwise it really just seems to me to be a myth.
Helpful comment - while it is my defence of choice against 3. Nc3 I've not been playing the Nimzo that long so good to understand the variety of paths that can emerge.
I can't remember which one but my source for the double c-pawn strategy was a fairly general opening book, so granted I accept this might not be the sharpest idea at grand master level today (although I understand this was one of Nimzowitsch's original ideas with the defence). However at the level I play, having any form of cohesive long term plan out of the opening generally gives me an edge over opponents (even those a little stronger than I), so it works as an approach for me.

@flyingbishop97 if you played just the Nimzo, and not the Semi-Slav, what would you play against 3.Nf3 ? Presumably 3...d5 ?
@flyingbishop97 if you are going to learn Nimzo-Indian ideas I'd strongly suggest learning Queen's Indian at the same time as an alternative response to 3. Nf3. While there are some key differences (e.g. many lines in the QID look to prevent e4 altogether rather than delay it as in the Nimzo) there is a lot of thematic crossover, and the two openings can often transpose in a number of lines.

If you commit to Nimzo... you must have a plan b.
Main options are Queens Indian, like suggested... very popular at GM level but has lot of study.
Classic d5, leading to a QGD style position, also very popular.
Bogo Indian, which is Nimzo with check not pin... not so popular, but scores similar, and is more simple.
Or c5, which is Spielman, give a benoni style game?
No variation is superior, is about which feel better.
But nowadays... many avoid Nimzo, so must have a plan b.
@flyingbishop97 if you played just the Nimzo, and not the Semi-Slav, what would you play against 3.Nf3 ? Presumably 3...d5 ?