In all cases, stir gin with ice in a chilled glass or pitcher for 45 seconds to a minute.
Don't shake despite what Bond always ordered.
Pour a bit of Vermouth in a chilled glass, swirl is around coating the glass then pour it out.
Strain the gin into the glass and add a twist or olive. Use Turkish olives if you dare.
Seriously, if you don't care for gin, try a Hendricks, Botanist or other non London Dry Gin martini. There's a huge difference in gins and the cheap stuff is awful unless you're making Salty Dogs or something.
or
Hendrick's and Fever Tree Elderflower Tonic.
or Fiery Turkish Olives and Bombay Sapphire