Most airports seem to require type as standard part of initial call for reasons previously stated so why does AMS specifically say at end of ATIS "Call approach with callsign only" (still doesn't stop some giving the full nine yards though!)
Frequency can be far too busy during peak-times to wait untill xxx123 has told you all about his acft type/altitude/cleared altitude/speed/his new car/his mother-in-law's birthday etcetc..
