S.
I wouldn't let my boys sleep with me at all unless they were infants and I was nursing them in the middle of the night. Even then most of the time I would end up putting them back in their crib. However it really depends on what you want. If it doesn't bother you or your husband, and you think you can continue as such indefinetly then why change. But I'm horrible if I don't get my sleep, and always thought I would rather have a 12month old cry through the night until he/she is used to the routine (& not remember it in the morning),then a 3/4/5 year old cry through the night not understanding why Mommy won't let he/she sleep w/ her anymore. So it really depends on what your priorities and preferences are. Having watched many nanny 911 shows, as well as some of my relatives having late night rising todlers, I'm glad I've stuck to my guns despite my husband wanting to cave in during the "let the baby cry-it-out" nights. My biggest advice is that if you decide on a routine, stick to your guns, don't cave in, and stick to the routine. Going back & forth is confusing to your child. There are great resources out there on how to get your child to sleep through the night if you do need it.
Good Luck
S.B.