Although honeysuckle and grapeseed extract might sound like an awesome combination, they might offer too much exfoliating for all but the thickest and leatheriest skin types (and certainly don't combine papaya with any other exfoliant - ouch!). Allantoin with other extracts might also be too exfoliating for sensitive skin, so you might want to go for aloe vera instead of straight allantoin. Cucumber and honeysuckle together might be a little too astringent for dry skin, as might be a combination of green tea and comfrey.
You can create some interesting combinations based on skin type. If you tend towards redness, consider something very anti-inflammatory, like comfrey or cucumber. Consider using white willow bark to help with inflammation - it's very powerful in that department!
For instance, my pale but red, acne prone skin could really benefit from honeysuckle and green tea, and I'd happily include comfrey as an extra anti-inflammatory and anti-redness ingredient and rosemary for oily hair or skin. (If you're really pale, save the skin whitening and sun sensitizing extracts like liquorice or those with AHAs like rosemary or comfrey for rinse off products.)
Allantoin, comfrey, and green tea might be an awesome combination for aging or weather damaged skin. If you're a lucky girl who has normal type skin, any combination of non-astringent extracts would work for you - every extract is filled with lovely anti-oxidants, which are generally very good things, and most contain anti-inflammatory ingredients.
Join me tomorrow - we'll take a look at formulating with various combinations of the extracts we've used so far!