Most feared... any gunboat with at least one missile turret. I fly fighters/bombers more than caps now, and gunboats just wreck me. The ones with normal turrets and even the ones with razor/pulse setups arent too bad, especially when I'm in a fighter or flying with a group, but missile spammers are difficult to counter no matter what I'm flying.
As for lol loadouts... well, I've seen so many I cant pick any specific one, but a month or two ago I saw a freelancer tagged, merc or pirate ID'd (cant remember) player flying a manta in delta, with a mix of bhg, order, corsair, and outcast guns... I mean, seriously, you have to try to fail that hard =P