>>109110193Plusses:
You can do what you want, do all the kiddie shit, don't do all the kiddie shit, whatever.
No pressure, you can chill somewhere and just soak in the atmosphere if you want, you can just keep looping around space shit Earth in the evening for a rest.
Single rider queues (don't do single rider for any harry potter rides at universal, the queues are amazing and you skip a preshow at gringotts).
Ride attendants don't give a shit. Lots of people go alone. More people go to a park and sometimes split up because they don't want to do a particular ride with an hour queue.
Cast members at role-playing restaurants apparently interact a bit more with solo diners (this could also be a negative, but then why the fuck would you eat at one of the interactive restaurants if you don't want to interact?)
Negatives
It's fun seeing other people's reactions and talking about rides
Pressure from friends/family.
Sudden extreme loneliness can kick in which sucks although this probably depends on your mental well being and situation.
If you usually share costs evenly on holiday, going alone will probably cost 30-50% more due to loads of things being priced for 2-4 people.