I used to dislike Trader Joes's, mainly because of the terrible parking near our store. I'm coming around. I think that a lot depends on what your local store carries. Our store has a million IPA's (ok, I exaggerate) but when I went to the Palm Desert store, it had a significantly smaller selection. My husband was in a bit of shock, only two kinds of Stone IPA, and no Ballast Point. The selection process was so much faster!
My current TJ favorites: their fresh salsa (medium) paired with the organic blue corn tortilla chips. This should be it's own food group.
Bool Kogi - their preseasoned Korean beef. I am sure that the foodies of the world are cringing, but for a quick meal I give them a thumbs up. I especially like these for timeshare stays where I don't have a full cupboard of spices etc.
Wine: Now to make the enologists cringe - Grifone wines ($3.99/bottle) I like the white for summer - nice and light, and I have also enjoyed the Primitivo (the bottle indicates that it is an Old Vine Zinfandel). I can only drink one glass of wine per day - Dr.'s orders - and I was sick of wasting expensive wine so I tried these. These are surprisingly nice wines to have with dinner on the weeknights.
I think that my favorite thing about Trader Joe's is that the store has a limited number of items. I can get in and out in 20 minutes. The clerks are very nice too.