The dissolution of the Soviet Union occurred on December 26, 1991, more than 26 years ago.
However, communist personalities (symbols) are still displayed in many places:
Question: Why does Russia seem to praise USSR personalities almost three decades after the fall of communism?
Points to consider:
The Soviet block was ruled from Moscow, and (in most cases) the Communist regimes were stablished while under the occupation of the Red Army in WWII. So, even ignoring ideological issues, for the other countries their Communist regimes represented foreign control.
On the other hand such control, and the dispute for global leadership during the Cold War, could represent to many Russians a period of grandeur. Compare that with the Russian defeat in WWI, critical situation at the beginnings of WWII and the crisis after the disolution of the Soviet Union. Many Russians may find that appealing, even if they are not personally fond of Communism1.
The fall of the Soviet Union was hard.
Living standards worsened for many people, pensions and salaries were low and inflation high.
Politically, not only Russia lost control of the East Europe satellites, many lands that had been part of the Russian Empire for centuries (Ukraine, Baltic countries, Caucausus countries) got their independence. The army was practically unoperative due to lack of funding, and the international influence of Russia was almost zero2.
That is the kind of situation that makes easy for a lot of people to remember favorably and idealize past times.
Perhaps related to #1, in the countries that once were part of the Soviet Union men linked to the former stablishment kept positions of power (even if they distanced themselves from Communism). The paramount examples would be Vladimir Putin (KGB coronel) and Boris Yeltsin (President of the Russian Federative Socialist Republic). Even assuming that these men do not long for the Communist regime, they probably are not as negative about it as other people could be, and maybe they could feel threatened if a policy of "tear down everything from the old regime" was promoted.
In the other countries of the Communist block, power went to members of the anti-Communist movements (Walesa in Poland, Havel in Czechoslovakia) who would had no ties (or not that important3) to the Communist regimes.
2For example they were unable to prevent the NATO from acting against Serbian backed forces in Bosnia-Herzegovina.
3Ion Iliescu in Romania, from example.
First, communists in Russia still enjoy quite a bit of popular support - they continuosly get ~15-17% of votes in presidential election, and about the same percentage of parliamentary seats. Compare that, for example, to Ukraine (3.8% votes in 2014 parliamentary elections and 1.5% in same year presidential election) or Poland (no representation in Parliament).
Second, quite a bit of Soviet statuary actually were taken down in Russia. Also, some objects named for communist figures were renamed, even some cities. But demolishing statues and renaming streets (or rebranding "militsiya" to "police") costs money, and with economic situation like it was in Russia during the 90s, it probably seemed inappropriate to waste funds on such non-essential tasks. Moreover, Russian government in the 90s made a big point of Russian Federation being the legal successor to the USSR. That would clash a bit with attempts to destroy the legacy of that regime. Other post-USSR countries, on the other hand, were founded on nationalist ideals, and their governments were quite committed to distancing themselves as far from their past as possible, so destroying statues was an important action to them and their electorate, and expenses were more justified in their eyes.
