My two boys were one of each. Bob was the TB, whilst Murphy was the cob. Both were amazing in ther own right, and I wouldn't have swapped either of them! I now have a TBxCob filly, so a bit of each!
I adored my TB Tnavas - he was such fun to ride but I also love my Clydesdale for the fact she looks after me and makes me feel safe - it's 14 years since Tnavas died and Serenity is the only horse I've ridden since.
Such prejudice, tut tut! My TB is 25, still being hacked and never been sad or sorry, a cob I owned had to be pts following injury, there's a lot to be said for both it depends on the individual horse and the job you want it to do.