Common Tajweed Errors

[godilali]

What are the most common tajweed errors you notice when people recite the Quran?

The top few I notice are:
- missing qalqalah
- missing ikhfa
- always doing takhfeef of raa
- not stretching in places of ghunnah
- not pronouncing taa or kaaf saakin with air
- prounouncing taa or kaaf mutaharrik with air
- not distinguishing between Daad and daal
- not distinguishing between taa and Taa
- not distinguishing between Haa and haa
- not distinguishing between zaal, dhaal, Daad, and Zaa
- not distinguishing between 'ayn and hamzah

[Hamood]

A tajwid Ustadh said one of the very common ones are when they over-stretch the alif.

[YousefAbusSafar]

Not clearly pronouncing the shaddah in the ya' of "iyyaka" in al fatihah, which alters the meaning drastically from what my Shaykh narrated to us in a class (Shaykh Abu Anas Muhammad ibn Musa aali Nasr).

I forgot what it changes to, but it's something to be very careful of.