Characters that produce a good back-and-forth between many different types of other character are usually the easiest to gain connections on.
I don't think there's a cut-out or a check-list for what these characters look like, though (agreeing with what those above are saying). Except that: they usually have a basic amount of EITHER interest OR need for socialising with others, if not necessarily the social skills. Remember the point of RP is to interact with others' characters, so build yours with that in mind.
If you're wanting to reverse-engineer this, then think about something like - what type of roleplay events do you find fun to attend? (Slice of life, combat, etc?) Or what type do you think look like they could be fun? Make a character that'd show up to that type of event, while still remaining flexible.
Like - if you wanna go to bar events - don't necessarily make a bartender who will only show up to bars, because then if something else shows up that looks fun you're limited away from that and you're back to feeling bad again - make a character who likes a drink after work. If you wanna go to combat events, make a mercenary who takes lots of different contracts from different employers; don't limit yourself to one region or one type of job.
As for the details, such as... What work are they drinking after? What different employers, and why? How did they get to be where they are today in life? Well, that's flavour that's entirely down to you, and I think will make very little difference on the amount of RP you can find. So basically: do whatever you think is fun, or compelling.
The main thing that's going to impact your amount of RP is how much you put yourself out there. You gotta turn up to events, add people to your friends list that you had fun roleplaying with, message them back to ask if they wanna roleplay again, send tells in-game to people who've posted in the Making Connections forum, join a linkshell or eight, and keep showing up to sessions. Once you've got that down, everything else falls into place; plots emerge naturally between characters, further meetings organise themselves. But first, you gotta show up.
tl;dr:
1) Broad character concepts are good; don't limit yourself.
2) You can make basically anything work as long as you're following point 3, which is
3) Show up. Show up. Show up. Keep showing up.
I don't think there's a cut-out or a check-list for what these characters look like, though (agreeing with what those above are saying). Except that: they usually have a basic amount of EITHER interest OR need for socialising with others, if not necessarily the social skills. Remember the point of RP is to interact with others' characters, so build yours with that in mind.
If you're wanting to reverse-engineer this, then think about something like - what type of roleplay events do you find fun to attend? (Slice of life, combat, etc?) Or what type do you think look like they could be fun? Make a character that'd show up to that type of event, while still remaining flexible.
Like - if you wanna go to bar events - don't necessarily make a bartender who will only show up to bars, because then if something else shows up that looks fun you're limited away from that and you're back to feeling bad again - make a character who likes a drink after work. If you wanna go to combat events, make a mercenary who takes lots of different contracts from different employers; don't limit yourself to one region or one type of job.
As for the details, such as... What work are they drinking after? What different employers, and why? How did they get to be where they are today in life? Well, that's flavour that's entirely down to you, and I think will make very little difference on the amount of RP you can find. So basically: do whatever you think is fun, or compelling.
The main thing that's going to impact your amount of RP is how much you put yourself out there. You gotta turn up to events, add people to your friends list that you had fun roleplaying with, message them back to ask if they wanna roleplay again, send tells in-game to people who've posted in the Making Connections forum, join a linkshell or eight, and keep showing up to sessions. Once you've got that down, everything else falls into place; plots emerge naturally between characters, further meetings organise themselves. But first, you gotta show up.
tl;dr:
1) Broad character concepts are good; don't limit yourself.
2) You can make basically anything work as long as you're following point 3, which is
3) Show up. Show up. Show up. Keep showing up.