I think the worst I played was a Samurai based MMO (can't remember the name, sorry) which let me download the 8Gb installer & make my character - before telling me mid-tutorial "You have 4 hours to trial this game before you must buy a..."
Don't get me wrong, I like the F2P model. If a game does it well (and some do) they can be fun. But if I feel like a game is trying to force me to pay - under the pretense of being F2P - I won't waste the disk space. On the other hand, if I'm enjoying a F2P game and I see myself playing it for a few months, I have no problems paying a bit of money to get a slightly enhanced version.
I'm not talking Pay2Win (by my own rules, I would've already uninstalled that game), I mean the trivial things like a bigger bag, extra costume, XP boost. Supporting the developers to gain a bit of convenience. I have strange morals. I'm a bit of a cheap skate when it comes to things like music or apps, but games are different.
Some of the F2P games that I've enjoyed enough to support the developers:
- Path of Exile (not an MMO, but an excellent game)
- Star Wars the Old Republic
- Ragnarok Online 2
I started back on RIFT a few weeks ago after years of absence. It's a great game, it really is. They've done so much with it. So polished now, and here's the great bit: there's still a tonne of people playing it!
For those unfamiliar - the whole selling point of RIFT was the random encounters. So we're just questing around the newbie area and this invasion starts. Everyone in the area manages to clear all 40 of the random invasions, then the big boss gets pissed off and tries to take us out!
The video shows the boss encounter (starts after a few minutes) - it's an easy enough fight, but I do have three healers on me. Notice how at the start we're doubting about 2-manning the boss, but when we reach him there are loads of players there helping out.