Best to experiment on a swatch if not sure. Most incs/decs do have some sort of lean and that might be obvious in your piece. Also, some incs create holes which can be decorative if that's the look you're going for. When in doubt, try your options, esp when paired. And certain incs/decs look better in diff st patterns. What works great in st st might not be as effective in garter, lace, etc.
Keeping to the knitting basics