That pretty much describes Fossil.

As with Subversion, when you're not working on a project alone, you normally run Fossil on some central server somewhere. Then because it's a DVCS, you clone a copy of the repository to your working machine.

So far, it's vaguely like Git, but it diverges quickly because the default behavior of Fossil from that point on is basically identical to Subversion, only with a much saner branching model and more features. (Built-in wiki, ticket tracker, web UI...) A checkin on the local machine first checks the change into the local repo clone, then it attempts to sync the local repo with the remote repo it was cloned from. (That's a two-way sync, not just a push.) Thus, like Subversion, checkins normally immediately appear on the central server as soon as they're checked in.

The sync can fail, of course, but what happens then depends on why it failed.

If the sync failed because the tip of the branch you're working on has moved forward on the remote repo, because something else has been committed to it in the meantime, it aborts the checkin because to proceed would create an unintentional fork in the branch. So, it makes you do a pull first to merge the remote changes into your branch. You then re-build, re-test, and then check your changes in as the new branch tip. (You can force Fossil to accept it anyway, but then you have to deal with the forked branch.)

If the sync fails simply because the remote server couldn't be reached, your changes are checked into the local repo clone only. Once connectivity to the remote repo is re-established and you cause a sync, it pushes your local checkins to the remote server. Unlike the online sync failure case, Fossil won't refuse to sync your changes up to the remote even if it creates an unintentional fork, because otherwise there would be no way to sync. You must then resolve the the fork manually, which typically is done by selecting one of the fork tips as the new branch head and merging the other in. Alternately, you could call one of the fork tips a new branch, then merge later.

Fossil doesn't care which way you do it, because branch names are for the human only anyway. It wants you to resolve the fork only so you don't confuse the other humans, not to solve any confusion on Fossil's part. (Underneath, Fossil only cares about the relationships between the artifact hashes, not about human-friendly file and branch names.)

You can avoid the forked branch problem by checking changes in on a new branch when you know the remote repo is unreachable, such as when you have no Internet access and the remote repo is on a public server somewhere, or when you're working away from the office and the remote repo is inside a firewall and you're on the outside. Pushing a new branch never creates a fork.

If you don't like the autosync feature, you can turn it off, so it doesn't even try to sync changes between the local clone and the remote it cloned from on checkin. In this mode, it works more like Git, only with the day-to-day working sensibility of Subversion. You can then do manual pushes once your local repo is in a shape you feel like sharing.

If by "sharing with colleagues" you mean that you and your colleagues do not have mutual access to the same central repository, Fossil can cope with that, too. Fossil has a feature called "bundles" that pack up a subset of a repository, which can then be merged into a different repository. You can only do this if there is some history between the repositories, so that they at least share the same root — you can't just graft pieces of one repo onto a totally foreign repo — but it does let people who otherwise wouldn't have checkin rights on your repo send you changes. Because the Fossil bundle format preserves 100% of the Fossil feature set, it's basically an uber-patch(1) format, preserving things like checkin comments, branch points, file renames, etc., which unified diffs do not.

Git has some advantages, but you have to really need them bad to put up with the UX problems you mention. Examples:

1. Popularity. If you need tool integration — really need, not just want — then Git is more likely to be supported by your tools than Fossil.

2. GitHub. Some people's concept of "Git" is actually "GitHub". Fossil's web UI has a large subset of the features GitHub adds to Git, but if you need something Fossil lacks, such as the network effects stemming from GitHub's prime position in the software development community, it's fair to regretfully say you cannot use Fossil.

3. Rebase. Some people really really need this. Many more people think they need this. Fossil users prefer that a DVCS work more like an accounting system, which records what you actually did, not what you should have done, edited after the fact.

4. Working in private by default. Personally, I think this causes more problems than it solves. It encourages people to go off on wild tangents rather than collaborate with their peers. This mode of operation is essential in a development community the size and distributedness of the Linux kernel, but very few projects have this same pressure to decentralize. If you know all of your collaborators by name, you probably don't want everyone going off on their own wild tangents. If you can't safely commit to the trunk, check your stuff in on a branch so it doesn't break everyone's build, then merge when you're ready. Meanwhile, your coworkers can see what you've been up to, so no one's surprised when the branch finally gets merged in.