Passenger missions by far give the best payouts.
Just watch out for the ones with extremely high payouts - they involve Wanted passengers, and if you get scanned coming out of a station, you're dead.
Granted, it's actually not that hard to avoid being scanned - just go into silent running just before you exit, hug the station until you clear mass lock and jump.
You'll need to burn a heat sink or two to not overheat and get scanned, but it's possible to pull these off too. Same holds true for making your arrival, come at your destination in Silent Running and you'll be OK.
And watch out for the extreme distance missions - 30-50m for a passenger haul might sound tempting, but a 27k light year journey is something of an epic trip.
Skimmers are still rather profitable, as are Assassinations, but Assassinations can be a huge pain with the current interdiction mechanics - it's far too easy for your target to escape now.
Mining and Rare Item trade seem unaffected, and also remain viable sources of revenue.
I've not yet resumed my regularly scheduled bounty hunting because I'm still far from my ships in an Orca, but I reason it's probably not too different either.