A Dash 8D. Because if something has'nt already gone wrong with it, it probably will soon!;)

Good old Tu-154.
The best airliner, IMHO, (for ATC) ever. Great ROC (from GND to FL390 within 80-90NM); mach No range between .76 - .84 (max I saw was M.89 at FL390, pilot (former Balkan - Bulgarian airlines) claimed they can do it at the sea level as well) and with a friendly pilot in it, never had to use "magic word" (OTHERWISE "are you able... OTHERWISE...") on them.

Fascinating stuff.

And interesting comments about the A321 as well; seems like they might have similar issues getting out of the sky too - we were effectively vectored to 'undertake' one that was having some issues making the clearances into BRS the other week.

The f/o reckoned he could see 'uncharitable' hand gestures (am fairly certain he was joking) from the other flightdeck a couple of thousand feet above.

Cessna C500, 525, 550.

We call them high level speed bumps. I once had to slow a PA31 on approach to follow one. :ooh:

146's are a right pain in the neck. You never know how theyre going to perform....some actually do not too badly (in a relative sense :) ) while others are just plain crap. Asked one southbound out of Brum, just out of FL90, to expedite out of FL110 and the pilot replied that his present rate of climb (about 1100fpm) was the best he could give :ugh: :ugh: :ugh: :ugh:. Conversely, also had some inbound 146's that have chewed all over the back end of some 737's in front of them :confused: :confused:
E145's are the same. What a fantastically crap preforming aircraft :D :D :D, well certainly in the lower levels anyway.
Spamcan