This, of course, is strictly a matter of personal preference. I happen not to like crossfeed at all. But then again, I don't understand the oft-expressed objection to the image generated by most headphones. In particular, I don't get the "three blobs of sound" complaint.
Headphones don't image like speakers, but that doesn't mean (again, in my opinion) that the presentation is as annoying as some listeners seem to find it. I find that good phones give me pretty precise, realistic left-to-right placement of instruments, with not much front-to-back depth, and that's acceptable to me. The better cans that I've tried do offer some "out-of-head" width, with some of the sound appearing to come from outside the earcups.
I am generally dubious of the notion that faults in a recording can be electronically "fixed." I don't use bass boost, and I think that surround-sound simulators make absolute hash out of a good stereo recording. In the same way, I don't find that crossfeed materially improves on recordings with excessive left-right separation, and whatever improvement is gained is cancelled out by loss of detail. The early American mixes of Beatles recordings are just bizarre -- intruments in one channel and vox in the other. I don't think there is any help for that, other than tracking down the mono mixes that were released in England.
There is also the consideration that crossfeed places additional components in the signal path, and that can't possibly do anything good for the accuracy of the sound.
As I said, just my opinion. I've heard people (most of them on this forum) swear by crossfeed.
