Sorry if I'm asking an obvious question, but in what way was Toontown Online good?
Development was started in the N64 era, which is why the graphics aren't that great.
The game had a decent battle system. Very few gags/attacks were broken ( An organic Railroad does -214 to all cogs, which can take out any level of cog, and on the cogs side, a level 11 Mingler's paradigm shift could do -24 to all toons. )
Then you've got people obsessed with getting every reward:
1,600 SOS cards ( 800 VP battles minimum )
As many unites as possible ( There's a person who got 3,400 unites legitimately, 1 unite per CFO = 3,400 CFO battles )
All 96 summons ( 32 cogs/buildings/invasions )
255 fires ( 1-5 fires per ceo )
Another reason why the game was replayable was because of each type of toon could be made, which made the game different:
Toon-upless ( cannot heal team ), Trapless ( missing the most powerful gags ), Lureless ( cannot lure cogs, leaving toons open to attack ), Soundless ( unable to hit multiple cogs at once with regular gags ), and Dropless ( missing the second most powerful gags )
And the uber toons; toons with low laff, but maxed gags. Including: 15 Laff Sell Uber, 25 Laff Sell uber, 34 Laff Sell uber, and the Cashbot uber.
Soundless toons, Lureless toons, and occasionally Toon-upless toons are stereotyped as bad players, so if you play Toontown Rewritten, I recommend going Trapless or Dropless.