Find one with a respectable reputation. You probably do not want to be with a provider that's homepage to a lot of a dult sites, etc. This may or may not be a problem to check. Many of these type sites are banned from the major search engines, especially those that host the really bad free stuff. If Y ou know what I mean.
Dependability is another issue to consider.
Such as a lot of Server down time, Hard Disk crashes, and server program problems, etc. Stability is another one to consider. This type of free home page webpage hosting provider is also the ones that are forever changing their policies. Forever that is - while they last. They seem to come and go fast.