[PIF]

Mars - yes. Venus no - 800 degrees on a nice day with constant sulfuric acid rain, not to mention the crushing atmospheric pressure.

[oblomov]

...as well as no magnetic field, thus no protection from solar radiation.

[Moonman62]

Mars - yes. Venus no - 800 degrees on a nice day with constant sulfuric acid rain, not to mention the crushing atmospheric pressure.

...

But from the distance that we’re discovering these exoplanets, Venus would be portrayed as very earth-like. That’s my point.

[catbertz]

There are people rethinking the whole Venus is terrible theory, using its challenges as benefits. These links gives some examples:

https://www.quora.com/Why-are-we-thinking-about-a-Mars-colony-when-a-Venus-colony-would-be-more-technically-feasible

http://spectrum.ieee.org/aerospace/space-flight/nasa-study-proposes-airships-cloud-cities-for-venus-exploration