I prefer to start inland for my capital and concentrate on key technologies leaving the water improvement techs for a little later. I find that my 2nd or 3rd city being founded on a resource rich coastal location is very nice because I can pick up the sea techs fast at this point and improve the resources quickly, often buying work boats. When I start on the coast, I either have to build multiple work boats slowly (at a high opportunity cost in the early game since I am not building other things) or I have to divert hard earned early

to buying work boats instead of settlers or buildings.