No Thiels are not analytical, or harsh, or forward sounding.
The reason they sound that way when you heard them is because the components driving them were low fi.
If you use high quality components with good cables and follow placement recommendations, they are sublime. Vandersteens on the other hand sound good with cheap electronics because they are made with cheap components and designed for the average music listener, not the sophoisticated one.
The top end of Vandys is dull and rolled off, and the bass is boomy and inaccurate....just the cure for cheap electronics which sound harsh and have no real bass because they have cheap power supplies that can't deliver enough current to move the woofer accurately) and they are therefore perfect for unsophisticated listeners.