Back in the 90s I spent the early days of my being on the internet taking part in an IRC Star Trek RP group. STO let me recreate that character. I have bridge officers based off alternate characters I played in the group. My ship is based off the very first ship I ever commanded.
Plus I get to come up with my own uniform designs. And then change them at a moment's notice when I come up with a different (sometimes better, sometimes worse) design.
I get to run around in the Trek 'verse, piloting a starship, sending crew members off on missions.