I'd like to see it repealed and replaced with something better - lower premiums, lower deductibles - as long as coverage for pre-existing conditions was mandated. Both premiums and deductibles got absolutely crazy when the ACA was implemented. (Unless you're getting subsidies, it's now essentially un-affordable for most - eg: cheapest Silver PPO I could find in our area was > $15K / yr premiums with $7K+ deductibles - per person. That's potentially $29K in one year and simply insane - unless you get hit by a bus, it's essentially like not having insurance at all - and you get to pay a minimum of $15K/yr just to protect against catastrophic loss). HC plans were in general far better pre-ACA on those fronts.
Ideally, we'd go back to a free market system with the requirement that pre-existing conditions be covered. Finally passing the ability to buy insurance across state lines would go a long way in helping increase competition. That way, competition "should" keep premiums and deductibles a lot more reasonable than they became when the ACA was forced.
That said, I have next to no confidence (OK, pretty much none whatsoever) that with the current political climate the two sides could ever agree on ANYTHING, let alone something as important as a replacement plan..so, like most of the rest of you - we'd be up a creek if the ACA does get struck down and there is nothing that replaces it..as someone said up-thread..blank years on the resume is going to make the "go back to work" option pretty darn tough.