Finally got to play an RPG after many years (sadly, not Runequest)....in any case noticing that the characters intelligence doesn't come into play much.
For example, if you have a character of average intelligence do you behave any different than if you're character had high (or low) intelligence? There are things you know as a player and get translated to your character, but do you "dumb down" or "smarten up" that transfer based on the actual characteristic?
In other words, I feel we just "role play ourselves" for the most part - and that's probably to be expected. But just curious how you others role-play this?
This is a bit of a curious scenario since I personally rarely play characters with less than average intelligence because I love (and prefer) to be tactical, perceptive, and adaptable to situations.
A good way to play this (at least, in my experience) is to assume that your actual intelligence is somewhere in the average range (like maybe 8-13 on a 3-18 scale, though your mileage may vary).
Now let's assume you're playing a "genius" character (somewhere above your range). One thing you could do to roleplay "genius" intelligence is allow the other players to help you in decision-making and tactics out-of-character (as in, your character's mind has a complex thought structure that might be viewed as "other voices in my head"). Of course, the GM has to be okay with this as it IS sort of meta-gaming, but it's a viable option as a group of people are more likely to see multiple flaws in a plan or thought (or whatever the situation warrants) than a single person. Additionally, you could request more information from your GM than he already gave in a given situation, especially if your character might have some knowledge that could help. In this case, you'll want to ask specific questions leading toward those strengths.
Now, if you're playing someone with less intelligence than your given range, try to be more direct in your thoughts and actions, and don't think too much about things. For example, if the party comes upon a puzzle involving three statues, while the smarter people read the strange symbols and discuss how to solve the puzzle, you might poke, push, or move a statue out of impulse or impatience; the locked door could also be your target, if it's clearly where you're supposed to be going. If you're more of a smashy-type, you might start beating on objects (either chosen at random or maybe because you don't like the statue's face or some other detail about the object). If you (the player) have a great idea that you don't feel your character would think of, just don't say anything and come up with a less-intelligent solution (or, better yet, share the idea with the party's "genius" out-of-character.)
This is really all I can offer as it's the only solution my groups ever came up with. Some GMs are okay with the idea that you think normally even if your character clearly has a non-average intelligence as, honestly, it can be a pain to roleplay anyway.
Hope I at least helped spark some ideas.