Hosts with known issues:
Webs
Best for: active adopters
Issues: Webs will take your site down if you do not log in to your site regularly. All that needs to be done to bring the site back up is to log in, but for those that have moved on in life and just want to keep their collection up somewhere- this might lead to the loss of said collection a few months/years down the road

Wix
Best for: temporary use/those currently using wix.
Issues: Flash is being phased out in the next two years, so it is not advised to continue to use flash sites. Support and functionality can't be guaranteed past 2020 and performance is already iffy (the current flash sites all load very unreliably for me on my high spec gaming laptop), so we encourage those currently using flash sites to look into somewhere to move to in the next year or so. In the meantime, we will allow functioning flash sites to give those people time to make the transition.
Hosts that are generally all-around reliable:
Angelfire
Tripod
Wordpress
Personal sites
Please let me know of any other hosts you've had good experiences with- especially those that are low maintenance and have been around for a long time. Also please let me know of any other hosts that may have issues that people should be aware of before setting up their sites!