My only other 'modern' blog is on LiveJournal. The only thing LJ has over WordPress [or had] was no [reported] break-ins and consequent exposure of confidential data, up to and including methods of payment. However, where many people have never heard of LJ most have heard of WordPress; more usage=bigger target with more satisfying payoffs. No downtime I can recall, again in contrast with LJ. I do have a poorly-maintained blog there still, mainly for more confidential data (I won't define what I mean by confidential, but it isn't the usual).