Not a biggie, but the search box in Community has features that would be nice to have on the main site.
(a) Term(s) entered in search box remain until removed. Both Community and Main site have this and it's good.
(b) Term(s) entered in search box on Community can be cleared/cancelled with a click on x. The main site doesn't have this feature and terms must be backspaced out, or use a Ctrl_A/Del combination. I notice this especially when using on-screen keyboard on my PC/tablet at my Yamaha keyboard. As I said - it's a minor issue.
Reference: Examples of Search box behavior on Google and YouTube