Strikes me that your monitor (like almost all cheap ones) is way too blue. This would explain why, as a general rule, your posted photographs tend to be too yellow.
You won't get good colour accuracy from a TN Film monitor, especially off-axis, but you
can get a very significant improvement by running the Spyder over it.
Indeed, calibration is
more important with cheap screens than it is with good ones. For example, I just bought a new Spyder 3 Elite because I've lost my damn Spyder II, which would have done fine, and calibrated my two big photographic-grade Samsungs, Belinda's photographic-grade
Dell, and my non-photographic grade laptop screen. The Samsungs and the
Dell changed barely at all - because, being fine monitors, they were pretty accurate in the first place - but the laptop screen, a cheapish TN Film panel very like the one in your Asus, has changed a great deal, and very much for the better. i now regard my laptop as usable for revire and post-processing, where it was unusable before calibration.
Short answer: do it. It is absolutely worth it.