for me I guess it all depends on how the table's been playin (and of course position)......
if theres been alot of action...I prob just limp (or call a reasonable bet) and hope to see flop cheap.....
or, if it's been slow, make a mid sized raise and hope to isolate a lower pair or drawing hand (assuming I've been playing my usual > very few hands)
unfortunaletly when you when DO make your trip Js on the flop, lotta times there's also some kinda straight draw out ther for the other guy with his A,Q .....
even worse, the river pairs As,Ks, or Qs making you Js full, and the other guy runs over you with his Ship (just think of Rodney Dangerfield in Caddyshack, dropping anchor through Judge Smails little sailboat
)
if I can see the flop cheap enough.....think I'd rather have J w/9,10,Q ,K ...see what comes