Looks like I am going to be selling my house and going to be a live aboard..but Iam tall...6.4..what boats have the most head room?
Houseboats, followed by powerboats, as a general rule... :-)
In order to answer your question, it might help if you gave at least a HINT
as to the size of boat you're considering, and/or the budget you'll be working with...
I know I'm probably in the minority on this, but... I'm an inch taller than you, have spent a fair amount of time on a pretty wide variety of boats, yet I think headroom is one of the most overrated considerations in the selection of a boat... Even for a liveaboard, certainly it is nice to have, but it's still pretty far down my list of priorities re the choice of a boat... And, the smaller the boat, the greater the tradeoff will be between headroom and design elements like high freeboard or coachroof, shallow bilges, and so on... As a very general rule of thumb, there's an inverse proportion between LOA and headroom...
The greater the headroom, and the smaller the boat, the uglier the boat is likely to be... :-)