No matter what class you envy, you could get your hands (or paws) on some of their tricks. Of course, as with most things in engineering, the opportunities for use may not be as plentiful as would be desired. In addition, many engineering gadgets have an embarrassingly high failure rate.
Engineering is also the favored profession of many battleground twinks. Some of the tools available have some interesting and effective uses in PvP in particular.
Have you been considering engineering as a profession, perhaps for a twink alt, or through funding from your level 70 character? Do you plan on using the abilities strategically, in battlegrounds, or to fill in gaps in your class, or are you mostly in it for the fun and shock value?