Go where ever you think you would be happiest. Who cares what other people think (they won't think your weird unless your a weird person). No one stays at their home institution for fellowship. Your training hasn't actually started yet so you won't be any more imbalanced than anyone else who has only done residency at one institution.

I totally agree with the above. Who cares what others may think. At my institution the faculty are split about 50/50 on the idea of the 'need' to train elsewhere. If you look at a lot of the 'Academic' orthopods, many of them completed residency at their home program. Some even completed fellowship and then stayed on faculty without ever training outside of their institution.

There are benefits to training at your home institution, and benefits of training at another program, but I wouldn't go so far as to say that there are significant 'cons' to staying at your home program. In other words, it's more if just missing out on different styles of doing things, plus maybe not being able to expand your networking pool, but there are other benefits that neutralize those things. That being said, residency is largely the individual experience you carve out for yourself, given the resources, curriculum and faculty that exist. If you're going to be a happier, more productive resident at your home program, than I don't see any big negatives to doing residency there.

However, if you feel that the experiences and resources available at a different institution may provide you with greater future opportunities, even though it requires you to step outside of your comfort zone, then that is a decision you should seriously consider in my opinion. Even if it comes at the sacrifice of moving to a new place. I really don't think you can go wrong either way, as long as you choose the program that is the best 'fit' for you and your situation. If your home program is truly the best program for you, then nobody will fault you for training there.

Depends on how strong your home program is.

If you happen to go to a medical school that has a top tier ortho department, no one is going to blame you for staying there for residency.